# 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman

26-31 July 2021
Mexico City
Mexico/General timezone
HADRON 2021 is over. Thanks for making it a success!
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## Contribution List

Displaying 298 contributions out of 298
Type: Parallel Session: Exotic hadrons and candidates-8
The study of $P_c$ resonances in the compact pentaquark picture is performed in quark model and group theory. It is found that there are totally 17 possible compact pentaquark states, where the hidden heavy pentaquark states may take the color singlet-singlet and color octet-octet configurations. The partial widths of strong decay indicate that $P_c(4440)$ may not be a compact pentaquark state whi ... More
Presented by Mr. Wiriya RUANGYOO on 30 Jul 2021 at 12:40
Type: Parallel Session: Baryon spectroscopy-7
Track: Baryon Spectroscopy
The $p \Sigma^- \to K^- d$ reaction is driven by a triangle mechanism whose intermediate states consist of a proton, a neutron and the $\Lambda(1405)$. The triangle singularity developed by such a topology magnifies its cross section. We show that this observable, which is in a measurable range, will constrain the not well known theoretical $\bar{K}N$ subthreshold amplitudes thereby providing more ... More
Presented by Dr. Albert FEIJOO ALIAU on 30 Jul 2021 at 12:40
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-1
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
We estimate for the first time the mass shifts (scalar potentials) in symmetric nuclear matter of the $\Upsilon$ and $\eta_b$ mesons using an effective Lagrangian approach, as well as the in-medium mass of the $B^*$ meson by the quark-meson coupling model. The attractive potentials of both $\Upsilon$ and $\eta_b$ are expected to be strong enough for these mesons to be bound in various nuclei, ... More
Presented by Guilherme ZEMINIANI on 26 Jul 2021 at 12:23
Type: Parallel Session: Hadron decays, production and interactions-1
Track: Hadron Decays, Production and Interactions
An enhanced phenomenological model including isospin-symmetry breaking is presented. The model is then used in a number of statistical fits to the most recent experimental data for the radiative transitions $V\rightarrow P\gamma$ ($V=\rho$, $K^*$, $\omega$, $\phi$ and $P=\pi$, $K$, $\eta$, $\eta^{\prime}$) and estimations for the mixing angles are obtained. The current experimental uncertainties ... More
Presented by Rafel ESCRIBANO on 26 Jul 2021 at 12:00
Type: Parallel Session: Exotic hadrons and candidates-3
We used the diffusion Monte Carlo method to solve the Schrodinger equation describing several tetraquark systems within the quark model framework. We applied this technique both to all-heavy and to groupings with a couple of light quarks, in particular, to the structure of X(3872). Our approach produced a meson-meson configuration for that arrangement but, contrarily to the usual $D^0\bar{D}^ ... More Presented by Prof. María GORDILLO on 28 Jul 2021 at 07:45 Type: Leading parallel Session: Hadron decays, production and interactions-5 Track: Hadron Decays, Production and Interactions We determine$R_{\tau/P}\equiv \Gamma(\tau \to P \nu_\tau [\gamma]) / \Gamma(P \to\mu \nu_\mu[\gamma])$($P=\pi, K$). Whereas$P$decays are calculated by using Chiral Perturbation Theory (ChPT),$\tau$decays are studied with an effective approach where ChPT is enlarged by including the lightest resonances and following the high-energy behavior dictated by QCD. These ratios allow us to test the l ... More Presented by Ignasi ROSELL on 28 Jul 2021 at 11:15 Type: Parallel Session: Baryon spectroscopy-7 Track: Baryon Spectroscopy The$\Lambda$baryon spectrum is studied with the SU(3) flavor symmetry in the CQM. We found it difficult to accommodate some negative-parity resonances as single$q^2s$states in the normal three-quark picture. A possible interpretation is proposed: The$\Lambda(1520)$and$\Lambda(1690)$are mixtures of two$q^2s$negative-parity states, and the$\Lambda(1405)$,$\Lambda(1670)$and$\Lambda(2000 ... More
Presented by Mr. Kai XU on 30 Jul 2021 at 12:20
Type: Parallel Session: Hadron decays, production and interactions-5
Track: Hadron Decays, Production and Interactions
A theoretical analysis of the $C$-conserving semileptonic decays $\eta^{(\prime)}\to\pi^0l^+l^-$ and $\eta^\prime\to\eta l^+l^-$ ($l=e$ or $\mu$) is carried out within the framework of the Vector Meson Dominance model. A phenomenological model is then used to parametrise the VMD couplings and numerical values are obtained from an optimisation fit. The signature of CP violating operators from the S ... More
Presented by Royo EMILIO on 28 Jul 2021 at 12:20
we have shown that the recently discovered resonance-like signal $a_1(1420)$ can be fully explained by the decay of the ground-state $a_1(1260)$ into $K^*\bar{K}$ and subsequent rescattering through a triangle singularity into the observed final state $f_0(980)\pi$ without the need of a new genuine $a_1$ resonance. The effect of the triangle singularity, which is expected to be present, is suffici ... More
Presented by Mathias WAGNER on 30 Jul 2021 at 11:15
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-4
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
Abstract: The ALICE collaboration recently demonstrated that by combining excellent particle identification and a momentum correlation analysis method applied to pp and p-Pb collisions at LHC, it is possible to measure the strong interaction among hadrons with strange quarks and protons. In particular it was possible to measure with unprecedented precision all the proton-hyperon and proton-kaon in ... More
Presented by Prof. Laura FABBIETTI on 28 Jul 2021 at 09:00
Type: Parallel Session: Hadron decays, production and interactions-8
Track: Hadron Decays, Production and Interactions
Recent results by the ATLAS experiment on the charmonium production and on the B_c production and decays will be presented. The measurement of the associated production of the J/psi meson and a gauge boson will be discussed. The measurements of J/psi and psi(2S) differential cross sections will be reported. Measurements of differential ratios of the B_c+ and B+ production cross sections will be sh ... More
Presented by Tatiana LYUBUSHKINA on 30 Jul 2021 at 11:35
Type: Parallel Session: Exotic hadrons and candidates-8
Recent results from the ATLAS experiment on searches and measurements of exotic heavy hadrons will be presented. Studies of the pentaquarks with hidden charm in the Lambda_b decays in proton-proton collisions at 7 - 8 TeV will be discussed. New results on the heavy tetraquarks in the Run 2 data at 13 TeV will also be reported.
Presented by Andrew Mark WHARTON on 30 Jul 2021 at 12:00
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Photoproduction experiments are a key tool in the investigation of the spectrum of hadronic states and the way gluons contribute to this spectrum. The GlueX experiment, located at Jefferson Lab, features a linearly polarized tagged photon beam and is dedicated to the search for hybrid mesons, states with gluonic degrees of freedom. This talk presents results from our initial campaign of data taki ... More
Presented by Dr. Peter PAULI on 29 Jul 2021 at 07:00
Type: Parallel Session: QCD and hadron structure-A4
Describing hadronic structure is one of the most intriguing problems in physics. GPDs provide exhaustive information on this respect. Starting from pion LFWFs and relying on the covariant extension formalism, we design a novel path towards GPD models fulfilling every theoretical constraint required by QCD. We exploit them to obtain predictions for DVCS on pions at EIC kinematics, showing gluon dom ... More
Presented by Jose Manuel MORGADO CHAVEZ on 28 Jul 2021 at 09:40
Type: Parallel Session: Meson spectroscopy-4
Track: Meson Spectroscopy
The primary goal of the GlueX experiment at Jefferson Lab is to map the spectrum of light hybrid mesons. GlueX, which has a linearly polarized photon beam and a large acceptance for both charged and neutral particles, has access to both the neutral, $\gamma p\to\eta\pi^{0}p$, and charged, $\gamma p\to\eta\pi^{-}\Delta^{++}$, processes. This presentation will discuss the amplitude analysis of $\eta ... More Presented by Colin GLEASON on 28 Jul 2021 at 10:30 Type: Leading parallel Session: Hadron decays, production and interactions-3 Track: Hadron Decays, Production and Interactions BESIII has collected 2.9 and 6.3 fb-1 of e+e- collision data samples at 3.773 and 4.178-4.226 GeV, respectively. We have performed amplitude analyses on the decays of Ds -> K+K-pi+, pi+pi+pi-, KSpi+pi0, K+K-pi+pi0, etapi+pi+pi0, and D+ -> KSK+pi0. Rich structures have been observed in these decays. We will present the results based on these analyses. In addition, we will also report observations ... More Presented by Panting GE on 28 Jul 2021 at 07:00 Type: Parallel Session: Meson spectroscopy-4 Track: Meson Spectroscopy The COMPASS experiment at CERN collected a large sample of diffractively produced$\pi^-\pi^-\pi^+$events. The data contain signals from iso-vector resonances decaying into$\pi^-\pi^-\pi^+$. We extract the resonance signals by performing a detailed partial-wave analysis in bins of three-pion mass and squared four-momentum transferred from the beam to the target. In this talk, we will present ... More Presented by Mr. Florian KASPAR on 28 Jul 2021 at 09:50 Type: Invited plenary Session: Plenary Track: Invited Plenary The talk will review the progress in analysis tools, the methods required to extract properties of the hadronic states from their manifestation as resonances in scattering processes and decays. I will focus on the application of the techniques based on the general principles of the scattering theory, but will also touch upon the advances in the technical aspects of the relevant computation problem ... More Presented by Dr. Mikhail MIKHASENKO on 27 Jul 2021 at 09:00 Type: Parallel Session: Exotic hadrons and candidates-4 Track: Exotic Hadrons and Candidates We apply the effective range expansion and generalized Weinberg's compositeness relations to analyze the internal structures of several exotic hadron candidates near underlying two-body thresholds. This formalism enables us to give quantitative estimates of the weights of different constituents inside the exotic hadrons. Useful information, including the partial decay widths, can be predicted, whi ... More Presented by Prof. Zhi-Hui GUO on 28 Jul 2021 at 10:25 Type: Parallel Session: QCD and hadron structure-B7 Track: QCD and Hadron Structure Currently, in the scientific community of particle physics a great interest has been generated in the anomalous magnetic moment due to the disagreement that exists in the theoretical prediction and the experimental observation of the magnetic anomaly of the muon, aμ = (g − 2)/2. This discrepancy may arise from undiscovered particle effects through virtual loops, which could provide an indicatio ... More Presented by Raul TORRES on 30 Jul 2021 at 10:25 Type: Parallel Session: Exotic hadrons and candidates-6 Track: Exotic Hadrons and Candidates In this talk, I will provide distinguishable consequences of the$Z_{cs}(3985)$and$Z_{cs}(4000)$as two or one state. In the one-state scheme,$Z_{cs}(3985/4000)^−$state is the U-spin partner of$Z_c(3900)^−$. Otherwise, the SU(3) flavor partner of$Z_{c}(3900)$is$Z_{cs}(4000)$rather than the$Z_{cs}(3985)$. Another two important predictions in the two-state scheme are the existence of a ... More Presented by Dr. Lu MENG on 29 Jul 2021 at 12:00 Type: Parallel Session: Hadron decays, production and interactions-7 Track: Hadron Decays, Production and Interactions The observed matter-antimatter asymmetry in the universe composes a serious challenge to our understanding of nature. BNV/LNV decays have been searched in many experiments to understand this large-scale observed fact. But few in the case of$e^+e^-$collision experiments are performed. Here we present some recent results to search BNV and LNV at BESIII experiment. Presented by Huijing LI on 30 Jul 2021 at 09:45 Type: Parallel Session: Meson spectroscopy-5 Track: Meson Spectroscopy We present results to test the limits of the three-particle finite-volume formalisms by extracting hundreds of energies in frames up to, and including,$L^2/(2\pi)^2 \mathbf{P}^2 = 9$on three CLS ensembles with pion masses of 200, 280, and 340 MeV at fixed lattice spacing. We find the inclusion of d-wave interactions in both the two- and three-particle systems to be necessary to describe our data ... More Presented by Dr. Andrew HANLON on 28 Jul 2021 at 12:00 Type: Parallel Session: Meson spectroscopy-6 Track: Meson Spectroscopy Bottomonium is the bound state of a bottom and anti-bottom quark. Studies of this system provide insights into our understanding of QCD. The Belle II experiment at the SuperKEKB$e^+ e^-$collider is an upgrade of the B factory facility at KEK in Tsukuba, Japan. We present some recent results and describe the unique discovery potential for bottomonium physics and related exotic QCD states that thi ... More Presented by Bryan FULSOM on 29 Jul 2021 at 12:00 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-1 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We report predictions for the suppression and elliptic flow of Υ(1S), Υ(2S), and Υ(3S) in ultra-relativistic heavy-ion collisions and compare to experimental data. To obtain our results, we numerically solve a Lindblad-type equation for the evolution of the heavy-quarkonium reduced density matrix in the quark-gluon plasma. The resulting evolution describes the full 3D quantum and non-abelian e ... More Presented by Prof. Michael STRICKLAND on 26 Jul 2021 at 12:05 Type: Parallel Session: Exotic hadrons and candidates-5 Track: Exotic Hadrons and Candidates The Belle II experiment at the SuperKEKB e+e− collider plans to collect 50 times as much data as the previous generation of experiments. Belle II offers unique capabilities to use the bottomonium system (pairs of bottom/anti-bottom quarks) as a pathway to study new particles and physics beyond the Standard Model. We present the potential for studying exotic multi-quark states, and searching lept ... More Presented by Bianca SCAVINO on 28 Jul 2021 at 12:00 Type: Parallel Session: QCD and hadron structure-A8 Track: QCD and Hadron Structure The physical electron, physical photon and positronium in QED are often used as models to study hadron structure in QCD. I will present our recent work on solving the structure of these objects in a nonperturbative and relativistic approach based on the light-front Hamiltonian framework. The input Hamiltonian is from the QED first principles. I will compare the obtained observables describing thes ... More Presented by Zhao XINGBO on 30 Jul 2021 at 12:35 Type: Parallel Session: Exotic hadrons and candidates-8 Track: Exotic Hadrons and Candidates The fully charmed and bottom tetraquark is studied in the framework of non-relativistic quark model. Using mass spectra and wavefunctions, branching ratio and decay widths of the main, hidden and open charm (and bottom) channels of tetraquark are calculated and also consistent with the available experimental observations. Presented by Mr. Rahul MISTRY on 30 Jul 2021 at 12:20 Type: Parallel Session: Baryon spectroscopy-6 Track: Baryon Spectroscopy The branching ratio of$\Lambda_b\rightarrow \Lambda_{c}e^{-}\bar{\nu}_{e}$is studied in the framework of the phenomenological quark model. The matrix elements of semileptonic decay are written in terms of the overlap integrals of the baryon wave function. In the heavy quark limit, the six form factors are related to a unique Isgur-Wise function. The calculated branching ratio of$\Lambda_{b}$ba ... More Presented by Dr. Kaushal THAKKAR on 30 Jul 2021 at 10:05 Type: Parallel Session: Baryon spectroscopy-6 Track: Baryon Spectroscopy Recent CMS results on spectroscopy of beauty baryons, obtained using the data collected in proton-proton collisions at 13 TeV, are presented. Presented by Sergey POLIKARPOV on 30 Jul 2021 at 09:45 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-7 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We present a study of centrality classes based on the number of charged particles for the Multi-Purpose Detector (MPD) at NICA complex. We compare the centrality classes for different set of experimental conditions: midrapidity regions, number of hits and transverse momentum of registered particles in the TPC sub-detector for Bi+Bi collisions at$\sqrt{S_{NN}}$= 7.7 , 9 and 9.46 GeV generated by ... More Presented by Mr. Pedro Antonio NIETO MARIN on 30 Jul 2021 at 10:10 Type: Parallel Session: Hadron decays, production and interactions-7 Track: Hadron Decays, Production and Interactions The charged Lepton Flavor Violation (cLFV) is highly suppressed in the Standard Model (SM) by the finite but tiny neutrino masses. Its branching fraction is calculated to be at a negligible level and so far none has been found in all the historical experiments, including searches in lepton ($\mu$,$\tau$) decays, pseudoscalar meson (K,$\pi$) decays, vector meson ($\phi$,$J/\psi$,$\Upsilon$) decays, ... More Presented by Mengzhen WANG on 30 Jul 2021 at 10:05 Type: Parallel Session: QCD and hadron structure-B2 Track: QCD and Hadron Structure With its unique geometry, the LHCb detector provides unprecedented kinematic coverage at low x for charged particles in hadron collisions. The excellent momentum resolution, vertex reconstruction, and particle identification allows precision measurements down to very low pT. This talk will present recent LHCb measurements of prompt charged hadron production in proton-proton and proton-lead collisi ... More Presented by Ricardo VAZQUEZ GOMEZ on 27 Jul 2021 at 11:40 Type: Parallel Session: QCD and hadron structure-A1 Track: QCD and Hadron Structure In this talk we present the latest results on charm production obtained with the ALICE detector in pp collisions as well as recent measurements of charm-quark fragmentation fractions in pp collisions at$\sqrt{s} = 5.02$TeV. This is complemented by the charmed baryon-to-meson production ratios whose enhancement with multiplicity suggests modifications of the hadronisation mechanism. These results ... More Presented by Benedikt VOLKEL on 26 Jul 2021 at 12:40 Type: Parallel Session: Hadron decays, production and interactions-3 Track: Hadron Decays, Production and Interactions Measurements of CP asymmetries in charmless two-body B-meson decays can provide stringent tests of the Standard Model. In multibody decays, short and long-distance dynamics along with a sizeable effective weak phase in the interference between tree and penguin amplitudes can lead to a rich structure of CP violation as a function of the phase space. We present here the latest studies of CP violatio ... More Presented by Irina NASTEVA on 28 Jul 2021 at 08:05 Type: Parallel Session: Hadron decays, production and interactions-4 Track: Hadron Decays, Production and Interactions The production of charmonium(-like) states in pp collisions probes both perturbative and non-perturbative regimes of QCD. It is important to improve our understanding of the strong interaction. The LHCb experiment has been making important contributions to such studies, owing to the large yields provided by the LHC and the unique coverage of the forward rapidity region. This talk presents the late ... More Presented by Li XU on 28 Jul 2021 at 10:05 Type: Leading parallel Session: Meson spectroscopy-8 Track: Meson Spectroscopy I report on our recent work studying charmonium-like resonances on the lattice.The Luescher formalism with multiple volumes and inertial frames is employed on ensembles with a pion mass of around 280MeV.Elastic$D\bar{D}$scattering in the$J^{PC}=1^{--}$and$3^{--}$channels and coupled$D\bar{D}$and$D_s\bar{D}_s$scattering in the$0^{++}$and$2^{++}$channels are investigated.The relevance ... More Presented by Dr. Sara COLLINS on 30 Jul 2021 at 11:40 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-5 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We review recent work on Ward Identities (WI) and Effective Theories within the context of the QCD transition at finite temperature. Thermal resonances$f_0(500)$and$K_0^*(700)$generated within Unitarized Chiral Perturbation Theory (ChPT) scattering at finite temperature allow to describe scalar susceptibilities, which combined with WI yield interesting conclusions regarding the interplay be ... More Presented by Prof. Angel GOMEZ NICOLA on 28 Jul 2021 at 12:23 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-5 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei The mass of a nucleon consists of chiral variant and invariant components. Since their medium properties are different, the composition can be examined through matter in extreme conditions such as neutron stars. Using a parity doublet model for nuclear matter, we study the mass composition of nucleons through construction of neutron star equations of state assuming crossover from hadron to quark. ... More Presented by Mr. Takuya MINAMIKAWA on 28 Jul 2021 at 12:05 Type: Parallel Session: Exotic hadrons and candidates-4 Track: Exotic Hadrons and Candidates We discuss the distinguishing properties of the correlation functions of multiquark currents (tetra, penta, etc) compared to the correlation functions of bilinear and trilinear quark currents. Based on these properties, we demonstrate a proper way to construct QCD sum rules for exotic multiquark states. Based on W.Lucha, D.Melikhov, H.Sazdjian: PRD, 014010 (2019); PRD100, 074029 (2019), ... More Presented by Prof. Dmitri MELIKHOV on 28 Jul 2021 at 09:45 Type: Parallel Session: Baryon spectroscopy-2 Track: Baryon Spectroscopy Coherent photoproduction of the neutral pion and eta meson on the deuteron has been experimentally studied at incident photon energies below 1.15 GeV. A strong enhancement is observed near the$\eta d$threshold over the three-body phase-space contribution in the$\eta d$invariant-mass distribution. We report the reaction mechanism and$\eta d$peak structure based on Ref. [T. Ishikawa et al, arX ... More Presented by Dr. Takatsugu ISHIKAWA on 28 Jul 2021 at 07:25 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-3 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei In this talk we discuss the impact of various number of light quarks colors$N_c$and flavors$N_f$on the dynamical chiral symmetry breaking by using the Nambu-Jona-Lassinio (NJL) model of quarks. We also sketch the quantum chromodynamics (QCD) phase diagram at finite temperature$T$and/or chemical potential$\mu$for various$N_C$and$N_f$. Presented by Dr. Aftab AHMAD on 28 Jul 2021 at 08:26 Type: Parallel Session: QCD and hadron structure-A5 Track: QCD and Hadron Structure We present recent results for the color-octet heavy-quark potential from the instanton vacuum. The potential is defined by the Wilson loop, which will be computed within the instanton-liquid model for the QCD vacuum. We find that the color-octet heavy-quark potential turns out to be similar to the color-singlet one. We discuss the instanton effects on the color-octet heavy-quark potential and the ... More Presented by Mr. Kihoon HONG on 28 Jul 2021 at 12:40 Session: Round tables Presented by Simonetta LIUTI, Pavel NADOLSKY, Daniel TAPIA TAKAKI, Valerio BERTONE, Pasquale DI NEZZA on 30 Jul 2021 at 08:25 Type: Parallel Session: QCD and hadron structure-B2 Track: QCD and Hadron Structure We made simultaneous extraction of spin averaged and spin dependent PDFs within multistep MC procedures, with combined analysis of inclusive unpolarized and polarized jets from RHIC to Tevatron energies. By analyzing the preliminary results we had, we were able to discuss impact of theory assumptions on$\Delta g$. Presented by Mr. Yiyu ZHOU on 27 Jul 2021 at 12:00 Type: Parallel Session: Exotic hadrons and candidates-2 Track: Exotic Hadrons and Candidates After examining the Feynman diagrams corresponding to some candidates of hadronic molecular states, we propose a possible binding mechanism induced by shared light quarks. We use the method of QCD sum rules to calculate its corresponding light-quark-exchange diagrams, and the obtained results indicate a model-independent hypothesis: the light-quark-exchange interaction is attractive when the share ... More Presented by Dr. Hua-Xing CHEN on 27 Jul 2021 at 12:20 Type: Parallel Session: QCD and hadron structure-A4 Track: QCD and Hadron Structure Proton, the most common hadron in the universe, have a puzzle in their charge radius. Accurate knowledge of the radius is very important to understand how quantum chromodynamics (QCD) works in the non-perturbative region. ULQ2 experiment aims to obtain the most reliable radius for electron scattering. Commissioning of the new beamline and spectrometers is ongoing, and physics run will start from F ... More Presented by Dr. Yuki HONDA on 28 Jul 2021 at 10:20 Type: Parallel Session: QCD and hadron structure-A5 Track: QCD and Hadron Structure The Nonrelativistic Constituent Quark Model is a part of hadronic physics. Main NRCQM parameter-the initial constituent quark mass$M_q=m_e(\alpha/2\pi)^{-1}$=441\,MeV was recently confirmed by observation of exact representation of nucleon masses as integers of$m_e$. QED radiative correction$\alpha/2\pi$is important parameter in the expanded version of NRCQM-a global model, which contains inte ... More Presented by Dr. Sergey SUKHORUCHKIN on 28 Jul 2021 at 11:40 Type: Leading parallel Session: Analysis tools-1 Track: Analysis Tools We present a data-driven analysis of the S-wave$\pi\pi\to\pi\pi$and$\pi K\to\pi K$reactions using the partial-wave dispersion relation. The fits are performed to experimental, lattice data and Roy analyses. For the$\pi\pi$scattering we present single- and coupled-channel analyses. By analytic continuation to the complex plane, we found poles associated with the resonances$f_0(500)$and$K_0 ... More
Presented by Ms. Oleksandra DEINEKA on 26 Jul 2021 at 11:15
Track: Hadron Decays, Production and Interactions
In a recent work, we have studied the decay of the N^*(1895), which was found to arise from meson-baryon interactions in an earlier work. We investigate the decays to different meson-baryon systems and to final states involving \Lambda(1405) and a proposed \Sigma(1400). In this talk, I will show that the width of N^*(1895) can get an important contributions from the decay to light hyperon reson ... More
Presented by Prof. Kanchan KHEMCHANDANI on 27 Jul 2021 at 11:15
Type: Leading parallel Session: Meson spectroscopy-4
Track: Meson Spectroscopy
I will discuss a recent calculation where for the first time we determined an exotic $J^{PC} = 1^{-+}$ hybrid meson resonance in lattice QCD. Working with SU(3) flavour symmetry, we found a narrow resonance with a large coupling to at least one axial-vector--psuedoscalar channel. A simple extrapolation to physical light-quark mass suggests a broad $\pi_1$ resonance decaying dominantly through the ... More
Presented by Dr. Christopher THOMAS on 28 Jul 2021 at 09:00
Type: Parallel Session: Exotic hadrons and candidates-1
Exploring the nature of exotic multiquark candidates such as the X(3872) plays a pivotal role in understanding quantum chromodynamics (QCD). Despite significant efforts, consensus on their internal structures is still lacking. We demonstrate a novel approach to help address this problem by studying the X(3872) production in heavy ion collisions, where a hot fireball with ample light as well as cha ... More
Presented by Prof. Qian WANG on 26 Jul 2021 at 12:20
Type: Leading parallel Session: Analysis tools-4
Track: Analysis Tools
The talk will present ideas for the determination of complete experiments using graphs, based on a recently published, modified form of Moravcsik's theorem. The presented results are relevant for reactions with larger numbers of $N$ spin-amplitudes, which are of interest for forthcoming measurements, such as single-meson electroproduction $(N=6)$, two-meson photoproduction $(N=8)$ or vector-meson ... More
Presented by Dr. Yannick WUNDERLICH on 28 Jul 2021 at 09:00
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-8
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
The new facility, high-momentum beamline has been recently constructed to provide primary protons as beam particles up to 30 GeV at J-PARC. The first experiment measuring dilepton spectra for a variety of target materials has been successfully launched. Present and future plans will be explained. The beamline can be utilized as the secondary beamline to transport secondary particles like pions/kao ... More
Presented by Megumi NARUKI on 30 Jul 2021 at 11:40
Type: Parallel Session: QCD and hadron structure-B6
Being motivated by the challenging problem of confinement, we investigate QCD vacuum by the center vortex model. Inspired by DMCG and IMCG methods to identify vortices in lattice calculations and using Suganuma decomposition, we show in both methods under singular center gauge fixing, vortices appear in QCD vacuum in the continuum theory. Then, using the center projection, QCD theory is reduced to ... More
Presented by Dr. Sedigheh DELDAR on 29 Jul 2021 at 12:35
Double parton scattering, interactions where two pairs of patrons interact in two separate hard interactions, give us a way to study and test the correlations between two partons inside a hadron. The theoretical framework to systematically calculate these interactions have seen a remarkable development in the last decade.
Presented by Dr. Tomas KASEMETS on 29 Jul 2021 at 11:15
Type: Parallel Session: QCD and hadron structure-A6
I discuss photon-proton proton initiated double parton scattering (DPS) due to the limited information on the proton structure obtained from p-p collision data. In DPS initiated by quasireal photons, spitting in a qq̄ pair, the interaction rate is controlled by the virtuality. $\sigma_{DPS}$ has been calculated for the four jet production at HERA and a significant contribution is found. Moreover, ... More
Presented by Dr. Matteo RINALDI on 29 Jul 2021 at 11:35
Type: Parallel Session: Hadron decays, production and interactions-3
Track: Hadron Decays, Production and Interactions
BESIII has collected 2.9 fb-1 of e+e- collision data samples at 3.773 GeV, respectively. We have observed the doubly Cabibbo-suppressed (DCS) D decay of D+ -> K+pi+pi-pi0 with a branching fraction of (1.13+-0.08+-0.03)*10^-3. We find that the DCS/CF ratio of B[D+ -> K+pi+pi-pi0]/B[D+ -> K-pi+pi-pi0], corresponding to (6.28\pm0.52)tan^4(theta_C),is significantly larger than the naive expectation. ... More
Presented by Xiang PAN on 28 Jul 2021 at 07:25
Type: Parallel Session: QCD and hadron structure-B5
Future EIC measurements will improve our determination of collinear PDFs. To understand their impact, we explore the effect of EIC polarization asymmetries pseudo-data on quark and gluon helicity distributions in the proton, using the JAM Monte Carlo global QCD analysis framework. A corresponding impact study of inclusive DIS and parity-violating DIS planned data on unpolarized PDFs is also shown.
Presented by Filippo DELCARRO on 28 Jul 2021 at 12:20
Type: Parallel Session: Meson spectroscopy-8
Track: Meson Spectroscopy
Mass spectra and decay properties of Charmonia are computed in non-relativistic quark-antiquark Cornell potential model with additional smearing interaction. We have employed the non-relativistic numerical solution of Schr\"odinger equation for computing mass spectra. Further the confined one gluon exchange potential is employed perturbatively for computation of higher excited states. Various dec ... More
Presented by Mrs. Janaki PATEL on 30 Jul 2021 at 12:25
Type: Parallel Session: QCD and hadron structure-B6
This work discusses the electromagnetic (EM) pion form factor ($\pi$FF) in a deformed AdS geometry. We consider the conformal dimension of the hadron bulk field defined by the scaling dimension of the $q\,\bar{q}$ operator instead of the twist. We also compute the pion EM radius and compare it with the experimental data, finding a relative error of 30%.
Presented by Dr. Miguel Angel MARTIN CONTRERAS on 29 Jul 2021 at 11:55
Type: Parallel Session: Meson spectroscopy-3
Track: Meson Spectroscopy
We present the first calculation within lattice QCD of excited light meson resonances with $J^{PC}=1^{--}$, $2^{--}$, and $3^{--}$. Working with an exact SU(3) flavor symmetry, for the singlet representation of pseudoscalar-vector scattering, we find two $1^{--}$ resonances (one broad one narrow), a broad $2^{--}$ resonance, and a narrow $3^{--}$ state. based upon material appearing in arXi ... More
Presented by Mr. Christopher JOHNSON on 28 Jul 2021 at 07:45
Type: Parallel Session: QCD and hadron structure-B4
In this talk we show how to apply the SCET formalism to factorize Double Drell-Yan process involving a pion and a proton, with four leptons and the proton in the final state. We will show how the factorization of the cross-section leads to the appearance of a Double TMD and two GTMDs. Additionally, we will show how the subsequent zero-bin subtraction leads to the appearance of a new Soft Factor an ... More
Presented by Patricia Andrea GUTIERREZ GARCIA on 28 Jul 2021 at 09:45
Type: Parallel Session: QCD and hadron structure-A4
GPDs provide a 3D picture of the nucleon, and the hard exclusive pion production have been providing important inputs for understanding the chiral-odd GPDs. The Jefferson Lab Hall A experiment E12-06-014 extended the kinematic coverage in the quark valence regime, and has measured the cross section of exclusive $\pi^0$ production off protons at large values of $x_B$ (0.36, 0.48, and 0.60) and $Q^2 ... More Presented by Po-Ju LIN on 28 Jul 2021 at 10:00 Type: Leading parallel Session: Hadron decays, production and interactions-4 Track: Hadron Decays, Production and Interactions 1. We present a new study of the exclusive production of$f_{1}(1285)$at energies relevant for the HADES ($pp$) and PANDA ($p\bar{p}$) experiments at FAIR. The$VV$-fusion ($V=\rho,\omega$) processes and the$\gamma p\to f_{1}p$reaction are discussed [arXiv:2105.07192]. 2. Diffractive production of$f_{1}$within the tensor-pomeron approach is also discussed. Comparisons with the WA102 data and ... More Presented by Mr. Lebiedowicz PIOTR on 28 Jul 2021 at 09:00 Type: Parallel Session: Meson spectroscopy-2 Track: Meson Spectroscopy The latest spectroscopy measurements of open charm hadrons produced in beauty decays at LHCb are reported. These include the observation of new "exotic" hadron candidates that don't fit into the conventional picture of three-quark baryons and quark-antiquark mesons. Also observed are new excited charm states. These results provide tests of the predictions from lattice QCD and HQET. Excited charm s ... More Presented by Mr. Alberto Correa REIS on 27 Jul 2021 at 12:05 Type: Invited plenary Session: Plenary Track: Invited Plenary The discovery of many unexpected new resonance candidates dubbed as exotic states has been challenging the quark model. High-energy collisions of hadrons and nuclei are a good tool for investigating them, but prone to kinematical effects from hadron decays into final states. In turn, lepton and photon beams offer an efficient means to probe the hadron spectrum. In view of the upcoming EIC experime ... More Presented by Dr. Astrid HILLER BLIN on 26 Jul 2021 at 09:00 Type: Invited plenary Session: Plenary Track: Invited Plenary The past decades have witnessed the exciting discovery of more and more hidden-charm states beyond the conventional meson and baryon scheme. The LHCb experiment at the LHC has been at the forefront of this endeavour given its large heavy hadron yield and unique capability in reconstructing heavy hadrons. This talk presents a review of the recent experimental progress on hidden-charm states, in whi ... More Presented by Liupan AN on 30 Jul 2021 at 07:00 Type: Parallel Session: Meson spectroscopy-6 Track: Meson Spectroscopy We report the first measurement of exclusive cross sections for$e^+e^-\to B\bar{B}$,$B\bar{B}^\star$and$B^\star\bar{B}^\star$in an energy range 10.63-11.02 GeV. B mesons are reconstructed in a number of hadronic final states, and the three channels are separated with the beam-energy constrained mass. Results on$\Upsilon(5S)\to \Upsilon(1S,2S)\eta$and$\Upsilon(1S)\eta^\prime$branching frac ... More Presented by Todd PEDLAR on 29 Jul 2021 at 11:40 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-1 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei With a proper description of high-pt parton-medium interactions, rare high-pt probes can become a powerful tool for inferring bulk QGP properties. We thus developed a fully optimized computational framework DREENA, which combines the dynamical energy loss formalism with bulk medium evolutions. As a bulk QGP tomography example, we show that high-pt RAA and v2 predictions are sensitive to the early ... More Presented by Dr. Magdalena DJORDJEVIC on 26 Jul 2021 at 11:15 Type: Parallel Session: Hadrons in Hot and Nuclear Environment Including Hypernuclei-3b Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei The pre-equilibrium (PE) stage of quark-gluon plasma is prominent research problem in heavy ion community, and is mostly studied in low-pt sector. We propose to use high-pt particles energy loss instead, by employing our DREENA-B framework, which is suitable for analytically exploring distinct PE energy loss cases. We obtain that suppression is sensitive to diverse PE cases, and could elucidate th ... More Presented by Dr. Bojana ILIC (BLAGOJEVIC) on 28 Jul 2021 at 07:18 Type: Parallel Session: QCD and hadron structure-B8 Track: QCD and Hadron Structure The axial f.f. is a fundamental property of the nucleon and a key ingredient of neutrino-nucleon cross sections. We have calculated this f.f. in relativistic ChPT at leading and next to leading one-loop orders, assessing the impact of truncation in the determination of LECs from recent LQCD results. The explicit Delta(1232) is crucial to reconcile the light-quark mass dependence of the axial charg ... More Presented by Mr. Fernando ALVARADO on 30 Jul 2021 at 12:15 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-4 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We study the$p\Xi^-$and the$\Lambda\Lambda$correlation function employing recently constructed$N\Xi$-$\Lambda\Lambda$coupled-channel HAL QCD potential. By solving the coupled-channel Schrödinger equation with including the Coulomb interaction, the coupled-channel effect on the$p\Xi^-$and the$\Lambda\Lambda$correlation function is discussed. We show that the barely unbound scenario of th ... More Presented by Dr. Yuki KAMIYA on 28 Jul 2021 at 09:50 Type: Parallel Session: QCD and hadron structure-A1 Track: QCD and Hadron Structure From a deformed AdS$_5$space, we used the string/ gauge duality to study the deep inelastic scattering for unpolarized fermions with spin 1/2, considering the large Bjorken$x$parameter regime. Here, we also took into account an anomalous dimension of an operator which represents fermions at the boundary. From this analysis, we compute the corresponding structure functions, which are dependent o ... More Presented by Dr. Eduardo CAPOSSOLI on 26 Jul 2021 at 11:40 Type: Parallel Session: QCD and hadron structure-A1 Track: QCD and Hadron Structure We present the first-ever description the world data on the$g_1^{p,n}$structure function at small Bjorken$x$using evolution equations in$x$derived from first principles QCD. This analysis within the JAM global framework that allows us to fit all existing polarized DIS data below$x<0.1$as well as predict future measurements of small$xg_1^{p,n}$at the EIC. This is a necessary step in de ... More Presented by Mr. Daniel ADAMIAK on 26 Jul 2021 at 12:20 Type: Leading parallel Session: QCD and hadron structure-B1 Track: QCD and Hadron Structure I will shortly review how lattice and continuum QCD methods can be properly combined to deliver 2- and 3-points Green's functions, thus revealing some key features linked to the infrared dynamics of the theory. Moreover, they can be used to build a process-independent effective charge that can be of help in gaining further insight in hadron phenomenology. Presented by Prof. Jose RODRIGUEZ-QUINTERO on 26 Jul 2021 at 11:40 Type: Parallel Session: Meson spectroscopy-5 Track: Meson Spectroscopy We generalize the Lellouch-Lüscher formalism to decays to three degenerate scalar particles. The formalism allows a lattice calculation of the$K\to3\pi$weak decay, the isospin-breaking$\eta \to 3 \pi$QCD transition, and the electromagnetic$\gamma^*\to 3\pi$amplitudes that enter the calculation of the hadronic vacuum polarization contribution to muonic$g − 2$. Presented by Prof. Stephen SHARPE on 28 Jul 2021 at 12:20 Type: Parallel Session: QCD and hadron structure-A7 Track: QCD and Hadron Structure We study the coupled dynamics of the ghost propagator and the ghost-gluon vertex through Schwinger-Dyson equations. To close the system, we use recent lattice data for the gluon propagator and a Gauge Technique Ansatz for the three-gluon vertex. The numerical results for the ghost propagator and ghost-gluon vertex agree excellently to lattice data. Finally, a consistency check is done in the soft ... More Presented by Dr. Mauricio NARCISO FERREIRA on 30 Jul 2021 at 10:05 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-8 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei The STAR experiment measured global polarization of$\Lambda$hyperons in Au+Au collisions at$\sqrt{s_{NN}}$= 7.7 - 200 GeV. Global hyperon polarization, appearing due to spin-orbit coupling, reflects the initial orbital angular momentum and vorticity of the system. In this talk, we will report results of$\Xi$hyperon global polarization ($P_{\Xi^{-}+\overline\Xi^{+}}$) measurement for Au+A ... More Presented by Mr. Egor ALPATOV on 30 Jul 2021 at 12:41 Type: Parallel Session: Meson spectroscopy-7 Track: Meson Spectroscopy We study the scattering of two scalar glueballs within the dilaton potential model, that depends on a single parameter$\Lambda_G$. We unitarize to predict the lowest partial waves in the elastic window. These can be compared with lattice calculations, to validate the model and the connection of$\Lambda_G$to the gluon condensate. We investigate the possible emergence of a bound state, called g ... More Presented by Mr. Enrico TROTTI on 30 Jul 2021 at 10:30 Type: Leading parallel Session: QCD and hadron structure-B1 Track: QCD and Hadron Structure Results for the ground states and excited states of glueballs in Yang-Mills theory with$J^{\pm+}$, J=0,1,2,3,4 from Bethe-Salpeter equations are presented. The input comes from parameter-free Dyson-Schwinger calculations of the propagators and vertices. We compare with the corresponding lattice results and add some excited states to the known spectrum. Presented by Dr. Markus HUBER on 26 Jul 2021 at 12:05 Type: Parallel Session: QCD and hadron structure-B4 Track: QCD and Hadron Structure In the spin-1 deuteron, there are additional polarized structure functions which do not exist in the spin-1/2 nucleons. We discuss our recent studies on the gluon transversity and transverse-momentum-dependent parton distribution functions (TMDs) for spin-1 hadrons [1,2]. [1] S. Kumano and Qin-Tao Song, Phys. Rev. D 101 (2020) 054011 & 094013. [2] S. Kumano and Qin-Tao Song, Phys. Rev. D 103 ... More Presented by Prof. Shunzo KUMANO on 28 Jul 2021 at 10:05 Type: Parallel Session: QCD and hadron structure-A5 Track: QCD and Hadron Structure We study good, bad and not-even-bad diquarks on the lattice in a gauge-invariant formalism in full QCD. We establish their spectral masses with short extrapolations to the physical point, observing agreement with predictions. We find that only the good diquark has attractive quark-quark spatial correlations, with spherical shape and size$\sim 0.6~\rm{fm}$. Our results provide quantitative support ... More Presented by Dr. Anthony FRANCIS on 28 Jul 2021 at 11:20 Type: Parallel Session: QCD and hadron structure-A3 Track: QCD and Hadron Structure We obtain the gravitational form factors (GFFs) and investigate their applications for the description of the mechanical properties, i.e., the distributions of pressures, shear forces inside proton, and the mechanical radius, in a light-front quark-diquark model constructed by the soft-wall AdS/QCD. Presented by Dr. Sreeraj NAIR on 28 Jul 2021 at 07:20 Type: Invited plenary Session: Plenary Track: Invited Plenary The recently approved NA66/AMBER experiment (Apparatus for Meson and Baryon Experimental Research) at the CERN Super Proton Synchrotron pursues a broad research program in quantum chromodynamics. It ranges in its first phase from a precision measurement of the proton radius with a 100 GeV muon beam to investigating the quark-gluon structure of mesons in Drell-Yan processes. In a second phase, radi ... More Presented by Dr. Jan FRIEDRICH on 31 Jul 2021 at 09:00 Session: Plenary The main scientific contributions of Simon Eidelman, who sadly passed away recently, will be reviewed. Presented by Prof. Boris SHWARTZ on 31 Jul 2021 at 07:00 Type: Parallel Session: QCD and hadron structure-B3 Track: QCD and Hadron Structure Inclusive as well as exclusive emissions in forward and central directions of rapidity are recognized as excellent channels to access the proton structure at small-$x$. In this talk, first I will review the formal description of UGD, then I will describe the state of the art of some recent phenomenological analyses on the diffractive electroproduction of$\rho$mesons. Finally, I will present som ... More Presented by Dr. Michael FUCILLA on 28 Jul 2021 at 08:20 Type: Parallel Session: Hadron decays, production and interactions-4 Track: Hadron Decays, Production and Interactions Recent results on production and polarization of heavy mesons and quarkonia in pp and PbPb collisions from the CMS collaboration are presented. Presented by Stefanos LEONTSINIS on 28 Jul 2021 at 10:25 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-2 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei New heavy-ion collision experiments are turning to hard processes. Quarkonia or open heavy flavors are versatile probes, mostly described through models based on pQCD, AdS, or EFTs. LQCD provides nonperturbative input and constraints to such models. I discuss in-medium bottomonia, the complex static quark-antiquark energy, and the heavy-quark momentum diffusion coefficient, which are key quantiti ... More Presented by Dr. Johannes Heinrich WEBER on 27 Jul 2021 at 12:05 Type: Invited plenary Session: Plenary Track: Invited Plenary Using dispersion theory with an improved description of the two-pion continuum based on the precise Roy-Steiner analysis of pion-nucleon scattering, we analyze recent data from electron-proton scattering. This allows for a high-precision determination of the electric and magnetic radius of the proton,$r_E = (0.838^{+0.005}_{-0.004}{}^{+0.004}_{-0.003})$~fm and$r_M = (0.847\pm{0.004}\pm{0.004})$... More Presented by Dr. Yonghui LIN on 31 Jul 2021 at 08:25 Type: Parallel Session: Exotic hadrons and candidates-7 Track: Exotic Hadrons and Candidates We systematically calculate the mass spectrum of the higher excited fully-charmed tetraquark$cc\bar c\bar c$states including the S-wave radial excitations and the P-wave states with a nonrelativistic quark model. The recently observed$X(6900)$state may be the candidate of the first radially excited tetraquarks with$J^{PC}=0^{++}$or$2^{++}$, or the$1^{+-}$or$2^{-+}$P-wave states b ... More Presented by Dr. GuangJuan WANG on 30 Jul 2021 at 09:45 Type: Invited plenary Session: Plenary Track: Invited Plenary One of the biggest challenges in contemporary physics is understanding of the origin and dynamics of the internal structure of hadrons. Many aspects can be properly addressed via a variety of parton distributions: electromagnetic and gravitational form factors, distribution functions, generalized parton distributions and so on. In this talk, we present a contemporary picture of our current underst ... More Presented by Khepani RAYA on 27 Jul 2021 at 10:10 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-5 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei Confinement/deconfinement phase diagram within a five-dimensional fully anisotropic holographic model supported by Einstein-dilaton-three-Maxwell action. One of the Maxwell fields provides chemical potential, the second Maxwell field represents real spacial anisotropy of the QGP produced in heavy-ion collisions and the third Maxwell field is related to an external magnetic field. Presented by Dr. Kristina RANNU on 28 Jul 2021 at 12:41 Type: Parallel Session: QCD and hadron structure-B6 Track: QCD and Hadron Structure We will discuss confinement in a holographic perspective. We consider one isolated quark propagating in the vacuum of the gauge theory, the dual picture is an open string attached at the conformal boundary and extending in the holographic direction. We show that there will be a drag force breaking the quark only if the dual gauge theory is confining. Presented by Prof. Saulo DILES on 29 Jul 2021 at 11:35 Type: Parallel Session: Exotic hadrons and candidates-5 Track: Exotic Hadrons and Candidates In order to understand the nature of the XYZ particles, theoretical predictions of the various XYZ decay modes are essential. In this work, we focus on the semi-inclusive decay of heavy quarkonium hybrids into traditional quarkonium in the EFT framework. We find that our numerical results of the decay rates are different from the previous studies. We also develop a systematic framework in which th ... More Presented by Mr. Abhishek MOHAPATRA on 28 Jul 2021 at 12:40 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-6 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei In this presentation, I will discuss the application of chiral hyperon-nucleon and hyperon-hyperon interactions at next-to-leading order to light hypernuclei. This provides important constraints on these forces. I will discuss this for selected$A=3-7$single and double Lambda hypernuclei. A special focus will be on the impact of changes of binding energy of the hypertriton and on the inf ... More Presented by Dr. Andreas NOGGA on 29 Jul 2021 at 11:15 Type: Parallel Session: QCD and hadron structure-B8 Track: QCD and Hadron Structure Hyperons provide an unique avenue to study the strong interaction in baryon structure. Due to their limited life time, the production in e+e- annihilations is the only viable way to obtain information on the hyperon structure and internal dynamics through their electromagnetic form factors. With the unique data sets obtained by the BESIII collaboration, Presented by Xiongfei WANG on 30 Jul 2021 at 11:15 Type: Parallel Session: Baryon spectroscopy-7 Track: Baryon Spectroscopy Hades investigates nuclear matter and the properties of baryonic resonances. As part of the FAIR Phase-0 program, the hardware is being upgraded to enable a wide range of experiments, including investigating electromagnetic decays of hyperons produced in proton induced reactions. Feasibility studies show that the newly installed forward detectors are crucial for hyperon reconstruction. The hardwar ... More Presented by Gabriela PEREZ ANDRADE on 30 Jul 2021 at 11:40 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-3 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei In this talk I will review some of the effects of hyperons on the properties of neutron and proto-neutron stars with an emphasis on the so-called "hyperon puzzle''. I will discuss some of the solutions proposed to tackle this problem and re-examine also the role of hyperons on the cooling properties of newly born neutron stars and on the development of the so-called r-mode instability. Presented by Dr. Isaac VIDANA on 28 Jul 2021 at 07:25 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-7 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei Studying the properties of the 3ΛH gives insights about the interaction between the Λ and ordinary nucleons. ALICE measurements of the 3ΛH lifetime and binding energy demonstrate that 3ΛH is loosely bound. Therefore, the 3ΛH yields in pp and p-Pb collisions are very sensitive to nucleosynthesis models. The new ALICE measurements of 3ΛH production in small systems shown in this talk provi ... More Presented by Mr. Francesco MAZZASCHI on 30 Jul 2021 at 10:28 Type: Parallel Session: Exotic hadrons and candidates-2 Track: Exotic Hadrons and Candidates ISR physics is an interesting way to look for resonant states, which - in case of observation - has a clear signature. This is unique to an e+e- experiments. We present here first studies performed with the early Phase 3 data at Belle II. The Belle II experiment has recorded data corresponding to 89.99 fb-1 integrated luminosity, with which we have performed the analysis of the e+e- -> psi(2S), ps ... More Presented by Sen JIA on 27 Jul 2021 at 11:40 Type: Parallel Session: QCD and hadron structure-B5 Track: QCD and Hadron Structure The analysis of single transverse-spin asymmetries (SSAs) gives us tremendous insight into the internal structure of hadrons. In this talk I will discuss our results on the first global fit of SSA data from SIDIS, Drell-Yan, e+e− annihilation into hadron pairs, and proton-proton collisions. I will also report on a study based on these results of the impact the EIC at Brookhaven National Lab an ... More Presented by Daniel PITONYAK on 28 Jul 2021 at 12:00 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-1 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei The hierarchy of scales of heavy quarks and their bound states in a quark gluon plasma makes the system ideally suited for the use of effective field theories and the formalism of open quantum systems. We utilize these tools to perform a first principles treatment of these heavy particles in medium and analyze the regimes in which the dynamics take the form of a Langevin equation in which the medi ... More Presented by Peter VANDER GRIEND on 26 Jul 2021 at 12:41 Type: Parallel Session: Hadron decays, production and interactions-6 Track: Hadron Decays, Production and Interactions The unique tracking and PID capabilities of the ALICE detector allow for a precision study of the production cross sections of antinuclei at the LHC and measurements of their absorption in the detector material. In this contribution, recent results on light antinuclei production and the first ever measurement of the inelastic cross section of low momentum antideuteron and antihelium-3 will be pres ... More Presented by Dr. Manuel COLOCCI on 29 Jul 2021 at 12:40 Type: Parallel Session: QCD and hadron structure-A8 Track: QCD and Hadron Structure This is a study of the internal structure of pseudoscalar mesons through an algebraic model based on a truncation of the Shwinger-Dyson equations, which enables the analytical extraction of form factors (FFs), parton distribution functions (PDFs) and generalized parton distribution functions (GPDs) within the framework of the light-front formalism finding a relationship between them and the respec ... More Presented by Ms. Isela Melany HIGUERA ANGULO on 30 Jul 2021 at 11:15 Type: Parallel Session: Exotic hadrons and candidates-4 Track: Exotic Hadrons and Candidates Current interpretations of the novel Pc pentaquark states are reviewed and it is shown that all of them are in conflict with experimental evidence on photoproduction from Jefferson Lab and unpublished data on branching fractions from LHCb. A model that incorporates production and final state dynamics that is capable of describing the data will be presented. Presented by Prof. Eric SWANSON on 28 Jul 2021 at 10:05 Type: Parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates Based on the constraints of the heavy quark spin symmetry, we investigate the$P_{cs}(4459)$state using a coupled channel approach. Before the experimental findings, we had made some predictions. Using the experimental results, one can determine the free parameters. We dynamically reproduce the$P_{cs}(4459)$state in the coupled channel interactions, which may be a degenerate state. Furthermore, ... More Presented by Chu-Wen XIAO on 28 Jul 2021 at 08:25 Type: Parallel Session: Meson spectroscopy-7 Track: Meson Spectroscopy An exploratory study on the different sources of isospin breaking effects in hadrons using the Poincaré covariant Bethe-Salpeter and Dyson-Schwinger formalism is presented. As a first step towards the calculation of the omega-rho mass spliting, we analize strong isospin breaking effects and mass spiting for the pi^+, pi^- and pi^0 system inclunding non-valence effects into the Bethe-Salpeter int ... More Presented by Dr. Angel MIRAMONTES on 30 Jul 2021 at 10:10 Type: Leading parallel Session: Meson spectroscopy-1 Track: Meson Spectroscopy We present recent work on the determination of several scalar and tensor resonances produced in$J/\psi$radiative decays. We extract 7 total inelastic resonances, of which the most interesting ones are the$f_0(1500)$and$f_0(1710)$, considered glueball candidates. We implement many different parameterizations fulfilling the unitarity and analyticity requirements to asses our uncertainties. Fina ... More Presented by Mr. Arkaitz RODAS on 26 Jul 2021 at 12:00 Type: Leading parallel Session: Analysis tools-1 Track: Analysis Tools The Electron-Ion collider promises to be a leading facility in the study of hadronic interactions and structure but may also make significant contributions to elucidating the spectrum of exotic heavy hadrons. We report on recent progress from the JPAC collaboration aimed at motivating a exotic spectroscopy program through photoproduction at the EIC. Presented by Daniel WINNEY on 26 Jul 2021 at 12:05 Type: Leading parallel Session: Baryon spectroscopy-3 Track: Baryon Spectroscopy We present a new framework for pion electroproduction off the proton,based on a general parametrization of transition amplitudes, including gauge invariance and threshold behavior constraints.Data with energies 1.13GeV<W<1.6GeV and Q2<6GeV^2 are included.The model is an extension of the Juelich-Bonn solution incorporating constraints from pion-induced and photoproduction data.Performing large-scal ... More Presented by Dr. Maxim MAI on 28 Jul 2021 at 09:25 Type: Parallel Session: Exotic hadrons and candidates-6 Track: Exotic Hadrons and Candidates We have recently studied the interactions of$D-\bar D + c.c$with a nucleon, with the motivation to find formation of$P_c$like states. We consider all interactions in s-wave and solve scattering equations. We find formation of nucleons with hidden charm, spin 1/2, 3/2 and positive parity. We earlier studied the interaction of$D-\bar D$with a kaon, where a$K^*$-meson is found to arise. In th ... More Presented by Ms. Brenda MALABARBA on 29 Jul 2021 at 12:40 Type: Parallel Session: Hadron decays, production and interactions-7 Track: Hadron Decays, Production and Interactions To better understand the low-energy QCD in the strangeness sector there is a strong need of experimental data. The measurements of kaonic atoms transitions play a very special role, since they provide the interaction between kaons and nucleon/nuclei at threshold. The missing information is the determination of the hadronic 1s level energy shift and width of kaonic deuterium. The setup, SDDs develo ... More Presented by Dr. Florin Catalin SIRGHI on 30 Jul 2021 at 10:25 Type: Parallel Session: Baryon spectroscopy-5 Track: Baryon Spectroscopy The LHCb experiment collected the world's largest sample of charmed hadrons during LHC Run 1 and Run 2. With this data set, LHCb is currently providing the world's most precise measurements of properties and production of known charmed baryons, as well as discovering many previously unobserved states. The latest results from the LHCb Collaboration on charmed baryons are presented. Presented by Zhihao XU on 29 Jul 2021 at 12:00 Type: Leading parallel Session: Hadron decays, production and interactions-1 Track: Hadron Decays, Production and Interactions KLOE and KLOE-2 data (almost 8 fb$^{-1}$) constitute the largest sample ever collected at an electron-positron collider operating at the$\phi$peak resonance. Results on BR($\eta \to \pi^0 \gamma \gamma$), leptophobic B boson search via$\phi \to \eta B\to \eta \pi^0\gamma$channel,$\pi^0$production from$\gamma \gamma$fusion,$\phi\rightarrow \eta\pi^+ \pi^-$and$\phi\rightarrow \eta ... More
Presented by Stefano MISCETTI on 26 Jul 2021 at 11:15
Type: Invited plenary Session: Plenary
Track: Invited Plenary
The vast majority of hadrons are not stable with respect to the strong interactions, and are seen as resonant enhancements in the scattering of the lightest stable hadrons. Recent developments have enabled the determination of hadron resonance properties from scattering amplitudes determined from lattice QCD. A summary of the approach and several recent examples will be presented for resonances se ... More
Presented by David WILSON on 29 Jul 2021 at 08:10
Type: Invited plenary Session: Plenary
Track: Invited Plenary
In this talk, I will review the state of the art for high-precision lattice QCD calculations which test the Standard Model and aid in the search for new physics. I will focus particularly on calculations within in quark-flavor physics.
Presented by Dr. William JAY on 29 Jul 2021 at 09:35
Type: Parallel Session: Baryon spectroscopy-3
Track: Baryon Spectroscopy
We present a lattice calculation of the leading corrections to the masses of nucleons and $\Delta$ resonances. These are obtained in QCD+QED at $1$st order in the Isospin Breaking parameters $\alpha_{EM}$, the electromagnetic coupling, and $\frac{{\hat{m}}_{d} - {\hat{m}}_{u}}{\Lambda_{QCD}}$, coming from the mass difference between $u$ and $d$ quarks.
Presented by Mr. Simone ROMITI on 28 Jul 2021 at 10:10
Type: Invited plenary Session: Plenary
Track: Invited Plenary
The dynamics of the quarks and gluons inside the nucleon are a long-standing question in hadron physics. To shed more light on this topic, the excitation spectrum of the nucleons needs to be measured and compared to theoretical models like constituent quark models or lattice QCD calculations. In this presentation, an overview about the current status in light baryon spectroscopy will be given, inc ... More
Presented by Prof. Annika THIEL on 27 Jul 2021 at 08:10
Type: Parallel Session: QCD and hadron structure-B6
In this talk, we discuss an extension to the matching procedure proposed by Brodsky and de Teramond to obtain the two-body wave functions in the light-front formalism for holographic models. We compute the light-front wave function by considering different static dilaton fields and anti–de sitter (AdS)- like geometric deformations.
Presented by Prof. Alfredo VEGA on 29 Jul 2021 at 11:15
Type: Parallel Session: Hadron decays, production and interactions-2
Track: Hadron Decays, Production and Interactions
The BESIII experiment at the electron positron collider BEPCII in Beijing is successfully operating since 2008 and has collected large data samples in the tau-mass region, including the world’s largest data samples at the J/ψandψ(2S) resonances. The recent observations of hyperon polarizations at BESIII, which opens a new window for searching new physics beyond the SM, also attracts both expe ... More
Presented by Dr. Liang YAN on 27 Jul 2021 at 12:05
Type: Parallel Session: QCD and hadron structure-A6
The light kaonic atoms high precision X-ray spectroscopy is a key tool for understanding the low-energy QCD in the strangeness sector. The SIDDHARTA-2 collaboration is ready to perform the challenging measurement of the kaonic deuterium transitions to the fundamental level at the DAΦNE collider of the INFN-LNF. The contribution presents the experimental apparatus and the first results obtained du ... More
Presented by Dr. Marco MILIUCCI on 29 Jul 2021 at 12:15
Type: Parallel Session: Hadron decays, production and interactions-1
Track: Hadron Decays, Production and Interactions
The world’s largest sample of J/ψ 1.3 billion events accumulated at the BESIII dector offers a unique opportunity to study light meson decays. In recent years the BESIII experiment has made significant progresses in eta/eta' decays, including observation of eta'->pi+pi- mu+mu-, search for the rare decays of eta’ to 4pi0 and eta’ to gamma gamma eta as well as the search for CP violation in e ... More
Presented by Rongsheng SHI on 26 Jul 2021 at 11:40
Type: Leading parallel Session: Meson spectroscopy-1
Track: Meson Spectroscopy
Due to the high production of light mesons J/ψ radiative and hadronic decays, the largest sample of J/ψ events accumulated at the BESIII detector offers a unique laboratory to study the light mesons spectroscopy and search for the light exotic states. In this talk, we shall report the recent progresses on the light meson spectroscopy achieved at BESIII.
Presented by Shuangshi FANG on 26 Jul 2021 at 11:15
Type: Parallel Session: QCD and hadron structure-A8
We study the light meson with one dynamical gluon on the light-front quantum chromodynamics (QCD) Hamiltonian as well as a three-dimensional confinement. After fitting the light meson mass spectroscopy,  the light-front wave function provides a good description of the pion electromagnetic form factor, decay constant, and the valence quark distribution functions following QCD scale evolution.
Presented by Jiangshan LAN on 30 Jul 2021 at 12:15
Type: Parallel Session: QCD and hadron structure-A3
Understanding the spin structure of the proton as it emerges from the combined spin and orbital angular momentum of its quark and gluon constituents,has been a central question in QCD, motivating dedicated experimental and theoretical investigations from JLab to the future EIC.In this talk we show a new avenue to obtain a decomposition of both longitudinal and transverse nucleon angular momentum i ... More
Presented by Simonetta LIUTI on 28 Jul 2021 at 08:00
Type: Parallel Session: QCD and hadron structure-B6
We show the 't Hooft Equation and the light-front holographic Schrodinger Equation are complementary to each other in governing the longitudinal and transverse dynamics of color confinement in mesons (quark-antiquark) and baryons (quark-diquark). Together, they predict remarkably well the light, heavy-light and heavy hadrons spectroscopic data. The universal emerging hadronic scale of light-front ... More
Presented by Dr. Chandan MONDAL on 29 Jul 2021 at 12:15
Type: Parallel Session: Hadrons in Hot and Nuclear Environment Including Hypernuclei-3b
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
Light flavour hadron production plays an important role in understanding the dynamics of the QGP. The observation of collective-like behaviour in high-multiplicity pp and p-Pb collisions challenges the assumption that no QGP is formed in small collision systems. In this talk, the latest ALICE measurements of light flavour hadron production will be presented, focusing on measurements which suggest ... More
Presented by Dr. Silvia PISANO on 28 Jul 2021 at 07:00
Type: Parallel Session: Analysis tools-5
Track: Analysis Tools
Cross-section measurements in hadronic collisions play a crucial role in the physics program of ALICE, as they provide a baseline for normalization. A precise knowledge of the delivered luminosity is required, which can be obtained by combining information from the LHC instrumentation and the ALICE detector collected during the van der Meer scan. This contribution presents a review of the ALIC ... More
Presented by Dr. Chong KIM on 28 Jul 2021 at 12:00
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-8
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet-quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This talk presents a measurement of the angular distribution of charged particles around the jet axis in 5.02 TeV Pb+Pb and pp collisions, using the ATLAS detector at the ... More
Presented by Martin KRIVOS on 30 Jul 2021 at 11:15
Type: Parallel Session: Baryon spectroscopy-2
Track: Baryon Spectroscopy
Presented by Dr. Tobias SEIFEN on 28 Jul 2021 at 07:45
Track: Hadron Decays, Production and Interactions
The tree-level determination of the CKM angle gamma is a standard candle measurement of CP violation in the Standard Model. The latest LHCb results from time-integrated measurements of CP violation using beauty to open charm decays are presented. A new combination of all LHCb measurements is also performed. A precision of four degrees is obtained, which dominates the world average.
Presented by Mr. Wojciech KRUPA on 27 Jul 2021 at 11:40
Type: Parallel Session: QCD and hadron structure-A8
The internal structure of hadrons is characterized mostly Form Factors.The experimental determination of them is leading several studies towards accurate theoretical description.By means of the contact interaction,we present in this work the extraction of the elastic form factors of pseudoscalar,vector,and axial-vector mesons.Besides,using the recent results of a global fit in the contact interact ... More
Presented by Dr. Roger Jose HERNANDEZ-PINTO on 30 Jul 2021 at 11:35
Type: Leading parallel Session: Meson spectroscopy-3
Track: Meson Spectroscopy
Much is known about the photoproduction of pseudoscalar and vector mesons, which are the lowest-mass nonets of the constituent quark model. For the higher-mass nonets, new photoproduction data from a variety of facilities is being published. In this talk, I will briefly review the spectrum of mesons and review recently published results on photoproduction of mesons from Jefferson Lab and elsewhere ... More
Presented by Hicks KEN on 28 Jul 2021 at 07:00
Type: Parallel Session: Meson spectroscopy-3
Track: Meson Spectroscopy
Understanding the effective degrees of freedom in the low-energy, non-perturbative QCD regime has been a long-standing problem in hadron physics with meson spectroscopy providing invaluable information on the underlying dynamics. The search and study of exotic meson states — that is states that are not compatible with the Quark Model — is expected to provide us a direct insight and access to t ... More
Presented by Nicholas ZACHARIOU on 28 Jul 2021 at 08:25
Type: Parallel Session: Baryon spectroscopy-4
Track: Baryon Spectroscopy
A contact interaction is used to compute hadron masses. This is input to the Schwinger-Dyson (SDE) and Bethe-Salpeter (BS) equations for mesons and diquarks. The Faddeev equation is used to compute baryon masses using a quark-diquark approximation. Our results agree with experimental data and other reasonable theory predictions.
Presented by Gustavo PAREDES on 28 Jul 2021 at 11:55
Type: Parallel Session: Meson spectroscopy-1
Track: Meson Spectroscopy
The graviton soft wall model (GSW) provides a unified description of the scalar glueball and meson spectra with a unique energy scale. We use this model to calculate the masses of the odd and even ground states of glueballs for various spins. In addition, the spectra of the $\rho$, $a_1$,$\eta$ and $\pi$ mesons will be addressed. Results are in excellent agreement with current experimental dat ... More
Presented by Dr. Matteo RINALDI on 26 Jul 2021 at 12:45
Type: Parallel Session: Meson spectroscopy-8
Track: Meson Spectroscopy
Several recent CMS results on meson spectroscopy are presented. The measurements are based on the data sample collected in pp collisions at 13 TeV.
Presented by Leonardo LUNERTI on 30 Jul 2021 at 12:45
Type: Parallel Session: Baryon spectroscopy-7
Track: Baryon Spectroscopy
We investigated the meson-baryon scattering using time-order perturbation theory (TOPT) based on covariant baryon ChPT. Renormalized scattering amplitudes are obtained by solving the integral equations with the full off-shell dependence of effective potentials and applying subtractive renormalization. Our formalism has been successfully applied to the pion-nucleon scattering and extended to the me ... More
Presented by Dr. Xiu-Lei REN on 30 Jul 2021 at 12:00
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-7
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
We discuss the properties of neutral mesons using effective models of QCD: Nambu-Jona--Lasinio (NJL) model and Linear Sigma model with quarks (Lsmq). We show that when accounting for the effects of the magnetic field on the model couplings, the neutral pion mass decreases monotonically as a function of the field strength. We find an excellent agreement with recent lattice QCD calculations, reprodu ... More
Presented by Prof. Ricardo FARIAS on 30 Jul 2021 at 09:45
Type: Parallel Session: Analysis tools-4
Track: Analysis Tools
A modified version of Moravcsik’s theorem, based on graph theory, is applied to unambiguously determine the eight complex spin amplitudes for the photoproduction reaction of two pseudoscalar mesons. The intermediate result are slightly overcomplete sets of polarisation observables. In a subsequent step, these are reduced to minimal complete sets, consisting of 16 observables. As a final result, ... More
Presented by Mr. Philipp KROENERT on 28 Jul 2021 at 09:25
Type: Parallel Session: QCD and hadron structure-A8
In this contribution the proton is studied in a simple but dynamical model defined in Minkowski space, by solving the valence Bethe-Salpeter-Faddeev equation for a system of three spin-less bosons interacting through a contact interaction. The parameters of the model are set by comparing the calculated Dirac form factor with experimental data. Results for the single- and double parton distributio ... More
Presented by Dr. Emanuel YDREFORS on 30 Jul 2021 at 11:55
Track: Hadron Decays, Production and Interactions
LHCb has collected the world's largest sample of charmed hadrons. This sample is exploited to study at very high precision $D^0 -\overline{D}^0$ oscillations and to measure $C\!P$-violating asymmetries in processes involving $D$ mesons . New measurements from several decay modes are presented, as well as prospects for future sensitivities
Presented by Cervenkov DANIEL on 29 Jul 2021 at 11:15
Type: Parallel Session: Meson spectroscopy-4
Track: Meson Spectroscopy
Using the large COMPASS data set for diffractive three pion production, we investigate the contradictions found by previous experiments in the signal of the spin-exotic wave with spin, parity and charge conjugation quantum numbers $1^{-+}$. We determine a strong dependence on the analysis model as their cause and in turn create a model tuned to minimize such effects. Additionally, we study the rob ... More
Presented by Dr. Fabian KRINNER on 28 Jul 2021 at 10:10
Type: Leading parallel Session: Analysis tools-2
Track: Analysis Tools
In this work, we propose a new phenomenological model suited to all SU(3) mesonic two-body final-state interactions up to energies around 2 GeV to replace the isobar model. We show that the new model provides a clear indication of the mechanism responsible for the sharp rise observed in the ππ phase around 1 GeV. The phenomenological amplitudes proposed here are suited to any number of resonance ... More
Presented by Dr. Patricia MAGALHAES on 27 Jul 2021 at 11:15
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-3
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
The first detection of gravitational waves form a neutron star merger some years ago has highlighted the prospects of inferring properties of high-density matter from these spectacular astrophysical events. In particular, the postmerger phase represents an environment of hot and dense matter implying that the different observables from this phase carry valuable information. We will provide an over ... More
Presented by Dr. Andreas BAUSWEIN on 28 Jul 2021 at 07:00
Type: Leading parallel Session: Baryon spectroscopy-3
Track: Baryon Spectroscopy
Studies of the spectrum of the excited states of the nucleon (N*) with a focus on the search for states predicted in quark models but still not observed, known as the "missing" resonances", has represented a hot topic in hadron physics for several decades. Recently, several new (previously "missing") N* states have been discovered from a global multichannel analysis of exclusive photoproductio ... More
Presented by Victor MOKEEV on 28 Jul 2021 at 09:00
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-5
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
The search for the QCD critical point is currently underway using relativistic heavy-ion experiemnts. I will review the different approaches used in the description of hot and ultradense baryonic matter in and out of equilibrium when searching for the QCD critical point. Future perspectives are discussed to map out the phase diagram of strongly interacting matter from heavy ion collisions to neutr ... More
Presented by Prof. Jacquelyn NORONHA-HOSTLER on 28 Jul 2021 at 11:40
Type: Leading parallel Session: Meson spectroscopy-2
Track: Meson Spectroscopy
In this talk, the status of the lowest-lying positive-parity open-charm mesons will be addressed. In particular, we will discuss the pole structure associated with the D*0(2400) (in PDG nomenclature) resonance. By analyzing experimental data and LQCD simulation results within a specific theoretical framework, we conclude the presence of two different poles (instead of a single one) for the D*0(240 ... More
Presented by Miguel ALBALADEJO on 27 Jul 2021 at 11:15
Type: Parallel Session: Hadron decays, production and interactions-5
Track: Hadron Decays, Production and Interactions
For a general $H_b\to H_c\tau\bar{\nu}$ decay we analyze the role of the $\tau$ polarization vector in the context of LFU violation studies. We use a general phenomenological that includes several new physics terms. We show that both in the laboratory frame and in the center of mass, a $\mathcal{P}$ component is only possible for complex Wilson coefficients. We make specific evaluations of the pol ... More
Presented by Neus PENALVA MARTINEZ on 28 Jul 2021 at 11:40
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-6
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
We study Xi hypernuclei to understand the interaction between a Xi^- hyperon and a nucleus. Xi hypernuclei are identified in the nuclear emulsion and the binding energy of the Xi hyperon in the nucleus is measured. In the J-PARC E07 experiment, two new events with a deeply bound state of the Xi+14N system were detected. We interpreted that the two events are attributed to the nuclear 1p and 1s sta ... More
Presented by Dr. Masahiro YOSHIMOTO on 29 Jul 2021 at 12:41
Type: Parallel Session: Baryon spectroscopy-2
Track: Baryon Spectroscopy
Exploring the $N^*$ structure in experiments with electromagnetic probes is crucial for understanding of the strong interaction in non-perturbative regime and, in particular, for the emergence of hadron mass. The new CLAS results on beam spin asymmetry and polarized structure function $\sigma_{LT^\prime}$ will be presented in the talk. The data were collected with the electron beam energy 2.036 ... More
Presented by Evgeny ISUPOV on 28 Jul 2021 at 08:05
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Recent high-quality data samples from various experiments grant new insights into the excitation spectrum of light mesons; which are composed of up, down, and strange quarks. While the non-strange light-meson spectrum is already mapped out rather well, many predicted strange mesons have not yet been observed experimentally or need further confirmation. In this talk, I will give an overview over re ... More
Presented by Mr. Stefan WALLNER on 26 Jul 2021 at 07:35
In this talk, I will give a short overview of the present status in global analyses of nuclear parton distribution functions (PDFs) with an emphasis on their extraction from the CERN-LHC proton-lead data. I will discuss the relevance of treating systematically the free-proton PDF uncertainties and their correlations with the nuclear modifications. I will also briefly discuss how the nuclear PDFs a ... More
Presented by Petja PAAKKINEN on 27 Jul 2021 at 11:15
Observation of a near-threshold enhancement in the Lambda Lambda-bar mass spectrum from e+ e- -> phi Lambda Lambda-bar at energies from 3.51 to 4.60 GeV; Search for new decays of psi2(3823) & process e+ e- -> pi0 pi0 psi2(3823); Study of e+ e- -> pi0 X(3872) gamma & search for Zc(4020)0 -> X(3872) gamma; Search for e+ e- -> chi_cJ pi+ pi- & a charmonium-like structure decaying to chi_cJ pi+/- betw ... More
Presented by Ronggang PING on 29 Jul 2021 at 11:15
Type: Parallel Session: QCD and hadron structure-B8
We study the influence of quark-pair contributions in weak transition form factors of heavy-light mesons. Form factors are first calculated for space-like momentum transfers in a frame where such contributions are supposed to be suppressed. Analytical continuation to time-like region and comparison with the direct decay calculation provides an estimate of the role quark-pair contributions may play ... More
Presented by Maria GOMEZ-ROCHA on 30 Jul 2021 at 11:35
Type: Parallel Session: Meson spectroscopy-2
Track: Meson Spectroscopy
Motivated by the fact that mesonic constituent mass $m_q$ breaks linearity in Regge trajectories, we discuss how to implement nonlinear behavior holographically by deforming the quadratic dilaton into a non-quadratic one. This deformation adds an extra parameter into the model, which measures the $m_q$ effect, accounting for nonlinearity in the trajectory. We applied this model to the description ... More
Presented by Dr. Miguel Angel MARTIN CONTRERAS on 27 Jul 2021 at 12:25
Type: Parallel Session: QCD and hadron structure-B2
Recently, two photon PDF sets, CT18lux and CT18qed, based on the LUX ansatz in the CT18 global analysis were publicized. We discuss the various sources contributing to the photon PDF uncertainties, and emphasize the low-energy non-perturbative ones, including variations of inelastic structure functions in the resonance and continuum regions, a higher twist, target mass corrections, and elastic for ... More
Presented by Keping XIE on 27 Jul 2021 at 12:40
Type: Parallel Session: Baryon spectroscopy-4
Track: Baryon Spectroscopy
We propose a new type of structure for singly heavy baryons of $Qqq\bar{q}q$ in addition to the conventional one of $Qqq$. Based on chiral symmetry of the light quarks, we find $\Lambda_c(2765)$ and $\Xi_c(2967)$ are mostly $Qqq\bar{q}q$ while $\Lambda_c(2286)$ and $\Xi_c(2470)$ are mostly $Qqq$. The masses of negative-parity baryons are predicted. We also derive a mass formula and the extended Go ... More
Presented by Dr. Daiki SUENAGA on 28 Jul 2021 at 11:15
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Lattice QCD calculations of matrix elements of light nuclei can constrain nuclear effective field theories and models that are needed to interpret experimental searches for new physics using nuclei as targets. I will review recent lattice QCD calculations of two-body axial currents, moments of nuclear PDFs, and other nuclear matrix elements. I will also discuss recent progress on variational metho ... More
Presented by Michael WAGMAN on 26 Jul 2021 at 10:10
Type: Leading parallel Session: Baryon spectroscopy-2
Track: Baryon Spectroscopy
The study of excited nucleon N∗ states through the electroproduction of different exclusive channels is an important avenue for probing the nature of the non-perturbative strong interaction responsible for their generation. Experiments to study N∗ states over the nucleon resonance region have been completed based on analyses of CLAS πN, ηN, KY , and ππN data for Q2 < 5 GeV2 . Advan ... More
Presented by Daniel CARMAN on 28 Jul 2021 at 07:00
Type: Parallel Session: QCD and hadron structure-A5
In this talk, we present the recent results of the nucleon distribution amplitudes (DAs) and the nucleon decay constant $f_{N}$ in the leading twist accuracy based on the chiral quark-soliton model in the large $N_c$ limit. The nucleon DAs are expressed in terms of the discrete-level wave function and the quark-antiquark pair wave function in the presence of the self-consistent chiral fields. The ... More
Presented by Mr. June-Young KIM on 28 Jul 2021 at 12:20
Type: Parallel Session: Baryon spectroscopy-3
Track: Baryon Spectroscopy
The present work extends earlier studies of the reaction gamma p->p pi0 eta and has been motivated by the recently claimed observation of a narrow structure around an excitation energy of 1678 MeV [JETP106(2017)693].The existence of this structure cannot be confirmed. Instead, a statistically significant structure in the M(p eta) invariant mass distribution near 1700MeV is observed.The most likel ... More
Presented by Dr. Mariana NANOVA on 28 Jul 2021 at 09:50
Type: Parallel Session: Exotic hadrons and candidates-7
Partial wave analysis is performed, with effective potentials as dynamical inputs, to scrutinize the recent LHCb data on the di-$J/\psi$ invariant mass spectrum. Coupled-channel effects are incorporated in the production amplitude via final state interactions. The LHCb data can be well described. A dynamically generated pole structure, which can be identified as the $X(6900)$ state, is found. Our ... More
Presented by Ms. Zerui LIANG on 30 Jul 2021 at 10:25
Type: Leading parallel Session: Analysis tools-1
Track: Analysis Tools
In this talk we present a parametrization of the \pi K form factor that includes in addition to a dispersively constructed low energy part inelastic effects via resonance exchange. The amplitude is then used to study the decay \tau \rightarrow K_S \pi \nu_\tau. Pole parameters and residues of the K_0^*(1430) and K_0^*(1950) resonance are extracted.
Presented by Leon VON DETTEN on 26 Jul 2021 at 11:40
In this talk I will discuss what lessons can be learned about the structure of the famous X(3872) from the study of its yield in high-multiplicity pp collisions. In particular, I will comment on some recent data by the LHCb collaboration, and how well they are reproduced under the assumption of a compact tetraquark state or a loosely bound molecule.
Presented by Angelo ESPOSITO on 26 Jul 2021 at 11:15
Type: Parallel Session: QCD and hadron structure-A4
The wide-angle photo- and electroproduction of pions is investigated within the handbag mechanism in which the $\gamma^{(*)} N\to \pi N'$ amplitudes factorize into subprocess amplitudes, $\gamma^{(*)} q\to \pi q'$, and form factors representing $1/x$-moments of generalized parton distributions (GPDs). The subprocess is calculated to twist-3 accuracy taking into account both the 2- and 3-body Fock ... More
Presented by Kornelija PASSEK-KUMERICKI on 28 Jul 2021 at 09:20
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-1
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
We review the basic concepts of the transport of heavy-flavor particles in hot and dense QCD matter with applications to high-energy heavy-ion experiments. These encompass the transport of the heavy charm and bottom quarks in the quark-gluon plasma, their hadronization as well as the transport through hot and dense hadronic matter. Special emphasis will be on constraints from lattice-QCD to contro ... More
Presented by Prof. Ralf RAPP on 26 Jul 2021 at 11:40
Session: Round tables
Presented by Nora BRAMBILLA, Chris ALLTON, Xiaoyun YAO, Michael STRICKLAND on 30 Jul 2021 at 08:25
Type: Parallel Session: QCD and hadron structure-B3
Longitudinal and transverse single- and double-spin asymmetries in SIDIS, measured by HERMES, will be presented. These include the latest results on longitudinal double-spin asymmetries, the single-(beam)spin asymmetry, as well as a review of single- and double-spin asymmetries using a transversely polarized target. All those are extracted in multi-dimensional binnings, often for the first time ev ... More
Presented by Gunar SCHNELL on 28 Jul 2021 at 07:20
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-8
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
NA61/SHINE is a multipurpose fixed target facility at the CERN SPS. The main goals of the NA61/SHINE strong interactions program are to study the properties of produced particles relevant for the study of the onset of deconfinement. In this presentation, results from the NA61/SHINE strong interactions measurement program will be presented. In particular, the latest results on hadron spectra from d ... More
Presented by Szymon PULAWSKI on 30 Jul 2021 at 12:23
We compute the parton distribution functions (PDFs) of nucleon at hadron scale with an analytic model motivated by Dyson-Schwinger equation approaches, and then applied the DGLAP evolution to get glue and sea distribution at higher energy scale. We also proposed a mechanism of sea asymmetry in nucleon, through an additional $q/\bar{q}\rightarrow \pi$ process in DGLAP evolution.
Presented by Dr. Fei GAO on 26 Jul 2021 at 12:30
Type: Parallel Session: Exotic hadrons and candidates-5
The dynamical diquark model, which combines the Born-Oppenheimer approximation with the most minimal Hamiltonian, accommodates all known exotics in all flavor sectors. Here we apply it to the newly observed hidden-charm, open-strange exotics, using Hamiltonian parameters previously computed in other sectors. The mass splitting of Z_cs states indicates substantial SU(3) mixing between all 1+ states ... More
Presented by Mr. Steven MARTINEZ on 28 Jul 2021 at 11:40
Type: Parallel Session: Exotic hadrons and candidates-2
The $P_c$ pentaquark, reported by LHCb, has attracted a lot of interest. We investigate the $P_c$'s as a meson-baryon molecule coupling to the compact $uudc\bar{c}$ states. This coupling works as the short-range force in the molecule, while the pion exchange is employed as the long-range force. We study masses and widths of $P_c$ and discuss the roles of the short-range and long-range forces ... More
Presented by Dr. Yasuhiro YAMAGUCHI on 27 Jul 2021 at 12:40
Type: Parallel Session: Exotic hadrons and candidates-3
I discuss a novel scenario for the pentaquark-like signals in the LHCb data. I identify double triangle mechanisms with kinematical singularities. I demonstrate that the double triangle amplitudes reproduce the peak structures of $P_c(4312)$, $P_c(4380)$, and $P_c(4457)$, through an interference with other common mechanisms. Only the $P_c(4440)$ peak is due to a resonance with width and strength ... More
Presented by Dr. Satoshi NAKAMURA on 28 Jul 2021 at 08:05
Type: Parallel Session: QCD and hadron structure-A1
On the example of the CT18 NNLO global analysis at large x, we discuss strategies for comparing predictions of nonperturbative QCD approaches to the local x and as Q dependence of phenomenological PDFs. Impact of functional mimicry and scale dependence on effective powers of (1-x) falloff of PDFs is reviewed.
Presented by Prof. Pavel NADOLSKY on 26 Jul 2021 at 12:00
Type: Leading parallel Session: Meson spectroscopy-4
Track: Meson Spectroscopy
I will discuss the $\pi\eta^{(‘)}$ production in the double Regge model. The model explains the forward-backward asymmetry observed in this reaction by associating it with the exotic $P-$ wave, which in turn is related to the production of the putative $\pi_1$ hybrid meson. I will also discuss the Regge and Deck production of $\pi\pi$ resonances. The interference of the Deck and direct productio ... More
Presented by Dr. Lukasz BIBRZYCKI on 28 Jul 2021 at 09:25
Type: Parallel Session: QCD and hadron structure-A7
The pion meson in the present work is describe in the Nakanish Integral representation (NIR), for the Bethe-Salpeter amplitude, combined with the Lattice QCD. The quark mass running is fitted by the Lattice data. The results for the weak decay constant are found to be consistent with the experimental data. Also the valence probabilities and the Light-front distribuitions are e ... More
Presented by Prof. Joao Pacheco DE MELO on 30 Jul 2021 at 10:25
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-6
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
As a benchmark in the field of hypernuclear physics, study on the nature of hypertriton is one of the hottest topics. To solve the so-called “Hypertriton puzzle”, precise measurements on both the lifetime and binding energy are highly desired. Aiming at obtaining binding energy with high precision, we are developing a novel method using a machine learning model to detect hypertriton events rec ... More
Presented by Mr. Ayumi KASAGI on 29 Jul 2021 at 12:05
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Our knowledge of macroscopic features of neutron stars (NS) have been greatly progressed by recent astronomical observations. However, hyperon appearance in NS contradicts to the existence of NS with two solar masses (hyperon puzzle). For the microscopic understanding of nuclear matter with hyperons, there are growing efforts worldwide in hypernuclear spectroscopy. I will review recent experimenta ... More
Presented by Prof. Satoshi N. NAKAMURA on 30 Jul 2021 at 07:35
Type: Parallel Session: Hadron decays, production and interactions-1
Track: Hadron Decays, Production and Interactions
The GlueX experiment at Jefferson Lab studies the light-meson spectrum with a linearly-polarized 9GeV photon beam and a detector with near-complete coverage for neutral and charged particles. Measurements of spin-density matrix elements with unprecedented precision provide valuable input for the theoretical description of the production mechanism. We extracted SDMEs for the photoproduction of the ... More
Presented by Dr. Alexander AUSTREGESILO on 26 Jul 2021 at 12:40
Type: Parallel Session: Hadron decays, production and interactions-3
Track: Hadron Decays, Production and Interactions
Comprehensive studies of deuteron formation in the bottomonium region have not been performed so far. We review the phenomenological models available in the literature. We find consistency among the three $\Upsilon$s, but not with data from continuum. In particular, the simplest coalescence model seems to perform better. We also report the first prediction on H-dibaryon production rate, which are ... More
Presented by Dr. Davide MARIETTI on 28 Jul 2021 at 08:25
Session: Round tables
Presented by Ryan MITCHELL, Eberhard KLEMPT, Feng-Kun GUO, Christopher THOMAS on 30 Jul 2021 at 08:25
Session: Presentation
Presented by Dr. Karen Salome CABALLERO MORA, Dr. Aurore COURTOY, Dr. Cesar FERNANDEZ RAMIREZ, Dr. Pablo ROIG on 26 Jul 2021 at 06:30
J/ψ photoproduction off protons in ultra-peripheral p-Pb collisions are used to probe the gluon density at low Bjorken-x. The J/ψ photoproduction cross section is expected to grow as a power law with 1/x, unless gluon saturation occurs at low x. The ALICE collaboration measured it down to x∼3×10<sup>-5</sup>: the power law increase continues without significant change. With 2016 data, new c ... More
Presented by Mrs. Aude GLAENZER on 27 Jul 2021 at 11:40
Type: Parallel Session: Hadron decays, production and interactions-2
Track: Hadron Decays, Production and Interactions
Femtoscopic studies done by the ALICE Collaboration provided results with unprecedented precision for the short-range strong interactions between different hadron pairs. The next step is the direct measurement of genuine three-body forces. Such results would be a crucial input for low-energy QCD and neutron star studies. In this talk, the p–p–p and p–p–$\Lambda$ correlations and their cum ... More
Presented by Raffaele DEL GRANDE on 27 Jul 2021 at 12:45
Type: Leading parallel Session: Analysis tools-3
Track: Analysis Tools
We propose a deep learning method that identifies the pole configuration of a coupled-channel scattering, i.e., the number of nearby poles in each Riemann sheet associated with the structures in the amplitude. A generic parametrized S-matrix is used to generate the dataset and curriculum learning is used for the training. We apply our method to the elastic $\pi N$ scattering and found that the obs ... More
Presented by Dr. Denny Lane SOMBILLO on 28 Jul 2021 at 07:00
The transversity PDF $h_1^q$ can be accessed in SIDIS by measuring the polarisation of final-state hadrons produced off transversely polarised nucleons. We present the COMPASS results on the transversity-induced polarisation of $\Lambda$ and $\bar{\Lambda}$ hyperons produced off transversely polarised protons. Within the experimental uncertainties, no significant deviation from zero is observed. ... More
Presented by Mr. Andrea MORETTI on 28 Jul 2021 at 07:00
Type: Parallel Session: Exotic hadrons and candidates-1
The dependence of the production of the $X(3872)$ meson on the hadron multiplicity in pp collisions has been used as evidence against X being a charm-meson molecule. A simple modification of the comover interaction model gives excellent fits to the data from the LHCb collaboration on the multiplicity dependence of the production of $X$ and $\psi(2S)$, giving a range of compatible values for react ... More
Presented by Mr. Kevin INGLES on 26 Jul 2021 at 11:40
Type: Parallel Session: QCD and hadron structure-A6
We discuss the production mechanism of a fully charm tetraquark, discovered by LHCb. including SPS and DPS mechanisms. We construct a coalescence model of the tetraquark production. We calculate the distribution in $p_{t,4c}$ in the resonance mass window. The cross section for the $J/\psi J/\psi$ is also calculated. We do similar analysis for FCC. We discuss also production of $c \bar c b ... More Presented by Prof. Antoni SZCZUREK on 29 Jul 2021 at 11:55 Type: Parallel Session: Hadron decays, production and interactions-4 Track: Hadron Decays, Production and Interactions Up to now, the production of resonances in electron-positron annihilation has only been observed for states with quantum numbers JPC = 1−−. The direct production of the 1++ states could happen through two-photon or neutral current. Due to the smallness of the production rate, this process has never been observed experimentally. With the high luminosity and good performance of the BESIII exper ... More Presented by Tong LIU on 28 Jul 2021 at 09:25 Type: Leading parallel Session: Analysis tools-2 Track: Analysis Tools Lattice QCD offers a systematic pathway to numerically compute the resonant hadronic spectrum from first principles. A set of integral equations connects the short-distance dynamics computed from lattice QCD to on-shell infinite-volume scattering amplitudes. In this talk, I will discuss recent progress in determining three-hadron scattering amplitudes from lattice QCD, focusing on our recent study ... More Presented by Dr. Andrew JACKURA on 27 Jul 2021 at 11:40 Type: Leading parallel Session: Baryon spectroscopy-1 Track: Baryon Spectroscopy We present in this talk our recent progress made on the investigations of d*(2380) in a chiral quark model. In particular, we show that the effects of hidden-color channel in Delta-Delta system are less important than those in the traditional quark model calculations once the single baryon and the baryon-baryon system are treated in a consistent way in a microscopic quark model calculation. Presented by Prof. Fei HUANG on 26 Jul 2021 at 12:05 Type: Leading parallel Session: Meson spectroscopy-6 Track: Meson Spectroscopy The precision of lattice QCD calculations has been steadily improving for some time and is now approaching, or has surpassed, the 1% level for multiple quantities. At this level QED effects, i.e. the fact that quarks carry electric as well as color charge, come into play. In this talk we will present results from the first lattice QCD+QED computations of the properties of ground-state charmonium a ... More Presented by Dr. Jonna KOPONEN on 29 Jul 2021 at 11:15 Type: Parallel Session: Hadron decays, production and interactions-8 Track: Hadron Decays, Production and Interactions Proton decays are sought as manifestation of baryon number violation predicted by Grand Unification. Their amplitudes depend on nonperturbative QCD, and we calculate them on a lattice with chirally symmetric quarks at the physical point for the first time. Our results largely agree with previous determinations done with heavy quark masses. Therefore, our findings solidify evidence against simple G ... More Presented by Prof. Sergey SYRITSYN on 30 Jul 2021 at 11:55 Type: Leading parallel Session: QCD and hadron structure-A3 Track: QCD and Hadron Structure Momentum and spatial distributions of quarks and gluons are typically encoded in the so-called generalized parton distributions (GPDs). Being multi-dimensional quantities, extracting GPDs is very challenging, both experimentally and within lattice QCD. In this talk, we discuss lattice results on isovector GPDs of the proton, obtained on an ensemble of$N_f=2+1+1$maximally twisted mass fermions, w ... More Presented by Dr. Aurora SCAPELLATO on 28 Jul 2021 at 07:00 Session: Round tables Presented by Alejandro AYALA, Jacquelyn NORONHA-HOSTLER, Andreas BAUSWEIN, Jana GUENTHER on 30 Jul 2021 at 08:25 Type: Parallel Session: Analysis tools-3 Track: Analysis Tools We compute the *s*-wave masses of charmonium, a simple heavy quark bound state, using a quantum processor. We encode a Hamiltonian in a 3-qubit quantum circuit and measure its expectation value with respect to a ground state ansatz. Our results agree with classical calculations to high accuracy. This research constitutes the first quantum computation of a simple quark bound state, providing a step ... More Presented by Daniel GALLIMORE on 28 Jul 2021 at 08:05 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-4 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei Quantum features of the baryon number fluctuations in subsystems of a hot and dense relativistic gas of fermions are analyzed. We find that the fluctuations in small systems are significantly increased compared to their values known from the statistical physics, and diverge in the limit where the system size goes to zero. The numerical results obtained for a broad range of the thermodynamic parame ... More Presented by Mr. Rajeev SINGH on 28 Jul 2021 at 10:26 Type: Parallel Session: QCD and hadron structure-B4 Track: QCD and Hadron Structure We apply the formalism developed by Kovchegov and Sievert (2019) for studying transverse momentum dependent parton distribution functions (TMDs) at small-$x$to construct the small-$x$asymptotics of the quark Sivers function. We explicitly construct the fundamental “polarized Wilson line” operator to sub-sub-eikonal order and express the quark Sivers function in terms of this new operator. We ... More Presented by M. Gabriel SANTIAGO on 28 Jul 2021 at 09:25 Type: Parallel Session: Hadrons in Hot and Nuclear Environment Including Hypernuclei-3b Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei In this contribution the latest ALICE results on the inclusive J/$\psi$and$\Upsilon$nuclear modification factor in Pb--Pb collisions at$\sqrt{s_{\rm NN}}$=5.02 TeV will be presented. The transverse momentum and centrality dependence of J/$\psi$elliptic and triangular flow coefficients will also be shown, as well as the$\Upsilon(1{\rm S})$elliptic flow results. The results will be compared t ... More Presented by Ms. Alexandra NEAGU on 28 Jul 2021 at 08:12 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-2 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We have studied the properties of quarkonium states in a non-equilibrium bulk viscous QGP medium. We have computed the dielectric permittivity of the viscous medium within the HTL approximation, which has been used to compute the in-medium heavy quark complex potential. Using the deformed potential, we have computed the wave functions, binding energies, and decay widths of heavy quarkonia. Further ... More Presented by Dr. Lata THAKUR on 27 Jul 2021 at 12:41 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-6 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei Quarkonium suppression in heavy ion collisions has been used as a probe of the quark-gluon plasma (QGP) for decades. In this talk, I will review the application of open quantum systems to quarkonium transport in the QGP. I will discuss the quantum and classical transport equations in both the quantum Brownian motion and the quantum optical limits and show some phenomenological results. Presented by Dr. Xiaojun YAO on 29 Jul 2021 at 11:40 Type: Leading parallel Session: Exotic hadrons and candidates-5 Track: Exotic Hadrons and Candidates The Born-Oppenheimer approximation provides a description of heavy-quark mesons firmly based on quenched lattice QCD. The diabatic framework extends this description through the incorporation of unquenched lattice QCD data on string breaking. This allows for a unified description of conventional quarkonium, made of$Q\bar{Q}$, and unconventional quarkoniumlike mesons, containing meson-meson compo ... More Presented by Mr. Roberto BRUSCHINI on 28 Jul 2021 at 11:15 Type: Parallel Session: Meson spectroscopy-6 Track: Meson Spectroscopy We have studied one-photon radiative transitions of the charmonium$S$- and$P$-wave states within an analytic confinement model. Along two fixed basic model parameters (the c-quark mass and the global cutoff$\lambda$) we introduced only one adjustable parameter common for charmonium states$\eta_c$,$J/\psi$,$\chi_{c0}$,$\chi_{c1}$,$h_c$and$\chi_{c2}$to describe the quark distribution in ... More Presented by Dr. Gurjav GANBOLD on 29 Jul 2021 at 12:40 Type: Parallel Session: Analysis tools-3 Track: Analysis Tools To determine the fraction of a hadronic molecule component of exotic hadrons in a model-independent manner, we consider the weak-binding relation. However, it dose not work well for the systems with a large effective range such as$\Lambda_c(2595)$. We introduce the range correction to the relation and we perform the numerical calculation to search for the parameter regions where the weak-binding ... More Presented by Ms. Tomona KINUGAWA on 28 Jul 2021 at 07:25 Type: Leading parallel Session: Analysis tools-5 Track: Analysis Tools Precision measurements of several eta(′) decay channels, with emphasis on rare neutral modes, will be carried out at the Jefferson Lab Eta Factory (JEF) in 2023-4, using an upgraded GlueX detector in Hall D. The combination of highly boosted eta/eta' production, recoil proton detection, and a PWO insert makes JEF unique compared to other eta/eta' experiments. JEF will search for new gauge bosons ... More Presented by Prof. Zisis PAPANDREOU on 28 Jul 2021 at 11:15 Type: Parallel Session: Hadron decays, production and interactions-6 Track: Hadron Decays, Production and Interactions We study the two body decay of mesons using the helicity formalism. We find that to explain the ratio of partials wave amplitudes (PWAs) of the decay, the Lagrangian must include derivative interactions in addition to contact interactions. We estimate the coupling constants for the$1^{++}\to1^{--}0^-$,$1^{+-}\to1^{--}0^-$,$2^{-+}\to2^{++}0^-$, and$2^{-+}\to1^{--}0^-$decays by fitting the rati ... More Presented by Dr. Vanamali SHASTRY on 29 Jul 2021 at 11:40 Type: Leading parallel Session: QCD and hadron structure-A1 Track: QCD and Hadron Structure Following our recent Monte Carlo global analysis of the pion’s PDFs from Drell-Yan and leading neutron electroproduction data in the Jefferson Lab angular momentum (JAM) collaboration, we extend the next-to-leading order analysis to include effects from threshold resummation at next-to-leading logarithmic accuracy. We also present the success of fitting to large transverse momentum data and disc ... More Presented by Patrick BARRY on 26 Jul 2021 at 11:15 Type: Parallel Session: QCD and hadron structure-B7 Track: QCD and Hadron Structure We present the most recent results obtained by the BABAR detector at the PEP-II$e^+e^-$collider on the study of exclusive$e^+e^-$to hadrons processes. Among these, the study of very rich dynamic of the six- and seven-pion final states, and a new measurement of the$e^+e^-\to\pi^+\pi^-\pi^0$reaction. The latter is particularly important to improve significantly the precision on the total hadr ... More Presented by Claudia PATRIGNANI on 30 Jul 2021 at 10:05 Type: Parallel Session: Exotic hadrons and candidates-8 Track: Exotic Hadrons and Candidates Recent CMS results on exotic hadrons in pp and PbPb collisions are reported. Presented by Samet LEZKI on 30 Jul 2021 at 11:40 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-8 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei The LHCb detector is able to measure prompt and non-prompt quarkonia states through hadronic, radiative, and dilepton decays at forward rapidity. These unique abilities allow LHCb to study a wide range of charmonia states and their interactions in the QCD medium. Here we will discuss recent LHCb results on the production of$\chi_c$and$J/\psi$in pp, pPb, and PbPb collisions. Presented by Dr. Albert BURSCHE on 30 Jul 2021 at 12:05 Type: Invited plenary Session: Plenary Track: Invited Plenary Global QCD analyses of nucleon structure have made great strides in recent years, thanks to a steady influx of data from facilities like Jefferson Lab and the LHC. Meanwhile, the current standard in perturbative accuracy is now next-to-next-to-leading-order (N$^2$LO) in$\alpha_s$. In this talk, I will survey recent developments that have allowed contemporary QCD global analyses to benefit from th ... More Presented by Dr. Timothy HOBBS on 26 Jul 2021 at 08:10 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-2 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei In recent years there has been much progress on the investigation of the QCD phase diagram with lattice QCD. This talk will focus on the developments in the last few years with physical parameters and low chemical potential. Many of these results are important for the understanding of both the QCD transition in the early universe and heavy ion collision experiments which are conducted at heavy io ... More Presented by Jana N. GUENTHER on 27 Jul 2021 at 11:15 Type: Parallel Session: QCD and hadron structure-B7 Track: QCD and Hadron Structure Please see it in the 'comments' below (there were technical problema capturing it here) Presented by Francesca DE MORI on 30 Jul 2021 at 09:45 Type: Invited plenary Session: Plenary Track: Invited Plenary The BESIII experiment has accumulated large datasets at the charmonium resonances$J/\psi$,$\psi(3686)$and$\psi(3770)$as well as at various other center-of-mass energies in the region between 3.8 and 4.9 GeV. Among other things, these datasets allow us to study light hadrons and their properties, the production and decays of open charm mesons, and both well known and newly discovered exotic XY ... More Presented by Nils HUESKEN on 27 Jul 2021 at 07:00 Type: Parallel Session: Hadron decays, production and interactions-4 Track: Hadron Decays, Production and Interactions The following topics will be reported: Measurement of the branching fractions of psi(3686) -> Sigma0bar Lambda + c.c. and chi_cJ (J=0,1,2) -> Lambda Lambda-bar; Search for new hadronic decays of hc and observation of hc -> K+ K- pi+ pi- pi0; Observation of the decays chi_cJ -> Sigma0 anti-p K+ + c.c. (J=0,1,2); Inclusive chi_cJ and J/psi decay distributions. Presented by Guangrui LIAO on 28 Jul 2021 at 09:45 Type: Parallel Session: Hadron decays, production and interactions-2 Track: Hadron Decays, Production and Interactions Recent results on$e^+e^-$annihilation to hadrons below 2 GeV obtained at the SND experiment at the VEPP-2000 collider are presented. In particular, we discuss measurements of the$e^+e^- \to \pi^+\pi^-$and$e^+e^- \to n\bar{n}$cross sections and study of the radiative processes with$\eta$-meson in the final state. The preliminary results on the$e^+e^- \to \omega\pi^0$cross section measureme ... More Presented by Mr. Viktor ZHABIN on 27 Jul 2021 at 12:25 Type: Leading parallel Session: Baryon spectroscopy-5 Track: Baryon Spectroscopy Charmed baryons are interesting objects with a plausible light diquark subcluster structure. The Belle experiment provides an ideal setup to study charmed baryons having more than$10^{6}$reconstructed$\Lambda_{c}^{+}\to pK^{-}\pi^{+}$decays. In this talk, recent results on charmed baryon spectroscopy are presented. These include the spin and parity determination of$\Xi_{c}(2970)$, radiative d ... More Presented by Li JIN on 29 Jul 2021 at 11:15 Type: Parallel Session: Baryon spectroscopy-5 Track: Baryon Spectroscopy The weak decay of the charmed baryon ground state is interesting from several counts. First, it is an "hyperon laboratory", as decays proceed mainly via the$c \to s$transition. Second, the decay width is affected by QCD corrections, which are not well established theoretically. The Belle experiment is an ideal place to study charmed baryons with more than$10^{6}\Lambda_{c}^{+} \to pK^{-}\pi^ ... More
Presented by Yang LI on 29 Jul 2021 at 11:40
Type: Parallel Session: Hadrons in Hot and Nuclear Environment Including Hypernuclei-3b
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
Recent ALICE results in small systems have shown an increase in the yield ratios of strange baryons to pions with the charged particle multiplicity, reaching values similar to those observed in Pb-Pb, where the phenomenon can be ascribed to the formation of the Quark-Gluon Plasma. We report mid-rapidity measurements of (multi-) strange hadrons, coalescence and collective flow effects from small to ... More
Presented by Ms. Meenakshi SHARMA on 28 Jul 2021 at 07:54
Type: Leading parallel Session: Meson spectroscopy-7
Track: Meson Spectroscopy
I illustrate how resonance masses and widths can be extracted from Bethe-Salpeter equations (BSEs) with valence quark degrees of freedom, using the rho meson as the prime example. The existing calculations employ contour deformations to solve the BSE for complex resonance momenta on the first Riemann sheet and analytic continuations to access the second sheet. Direct calculations on the second she ... More
Presented by Dr. Gernot EICHMANN on 30 Jul 2021 at 09:45
Type: Invited plenary Session: Plenary
Track: Invited Plenary
The muon g-2 anomaly showing about 4$\sigma$ deviation between the SM prediction and the experiment is one of the most promising signals for physics beyond the SM. And the hadronic uncertainties are limiting the accuracy of the SM prediction. In this talk, I will discuss the role of recent results, obtained with CMD-3,SND,and KEDR detectors at e+e- colliders VEPP-2000 (0.15-1 GeV/beam) and VEPP-4( ... More
Presented by Mr. Evgeny KOZYREV on 31 Jul 2021 at 07:35
Type: Invited plenary Session: Plenary
Track: Invited Plenary
A large and unique data sample recorded by the Belle experiment at the KEKB asymmetric-energy $e^+e^-$ collider, allows us to perform precision baryon spectroscopy. We report recent results on charmed baryons from Belle, as well as early results from the Belle II experiment along with future perspectives. The Belle II experiment at the SuperKEKB energy-asymmetric $e^+e^−$ collider is a successor ... More
Presented by Mr. Vishal BHARDWAJ on 27 Jul 2021 at 07:35
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-2
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
We present results of the bottomonium meson spectrum using the NRQCD approximation at finite temperature using our FASTSUM collaboration's lattice simulations. Various numerical techniques including machine learning, Backus Gilbert and Bayesian approaches are compared to obtain estimates of the masses and widths of these states.
Presented by Prof. Chris ALLTON on 27 Jul 2021 at 11:40
We discuss our lattice QCD calculations of a number of tetraquark channels with at least one heavy quark where some phenomenological models, already fully constrained by fits to the ordinary meson & baryon spectrum, predict deep binding. We find no evidence of deeply-bound tetraquarks, except in previously established strong-interaction stable $I=0$, $J^P=1^+$ $ud\bar{b}\bar{b}$ and $I=1/2$, $J^P= ... More Presented by Dr. Brian COLQUHOUN on 27 Jul 2021 at 11:15 Type: Invited plenary Session: Plenary Track: Invited Plenary I this talk I will discuss an application of the numerical S-matrix Bootstrap approach to the determination of precise quantitative bounds on the low energy Wilson coefficients of effective field theories. In particular, I will focus on the first two low energy constants contributing to the massless chiral Lagrangian and compare our numerical results with the available data on pi-pi scattering. Presented by Dr. Andrea GUERRIERI on 29 Jul 2021 at 10:10 Type: Parallel Session: Meson spectroscopy-1 Track: Meson Spectroscopy A coupled-channel analysis of the BES3 data on the J/Psi radiative decay has been performed to identify the spectrum of scalar and of tensor mesons.The fit includes the BES3 data,the data from antiproton-nucleon annihilation and the data on pipi scattering. The analysis reveals the existence of ten scalar isoscalar resonances. In the tensor sector the radiative J/Psi data show only evidence for f2 ... More Presented by Prof. Andrey SARANTSEV on 26 Jul 2021 at 11:40 Type: Parallel Session: Hadron decays, production and interactions-8 Track: Hadron Decays, Production and Interactions The LHCb experiment is playing a crucial role in the study of rare and forbidden decays of charm hadrons, which are sensitive to effects beyond the Standard Model. New searches for FCNC-mediated processes and asymmetry measurements in final states with two leptons are presented. Presented by Alessandro SCARABOTTO on 30 Jul 2021 at 11:15 Type: Parallel Session: Hadron decays, production and interactions-5 Track: Hadron Decays, Production and Interactions The recent results at Belle of$\mathcal{B}(\tau^-\to\nu_\tau\pi^-\ell\overline{\ell})$, considered the most important background of some possible LFV and LNV processes, has encouraged us to make a reanalysis of these decays. In this work, we use$\chi$PT extended to include resonances, (R$\chi$T) to compute the effective vertex$W^\star\gamma^\star P$involved in such processes including effects ... More Presented by Dr. Adolfo GUEVARA on 28 Jul 2021 at 12:00 Type: Parallel Session: QCD and hadron structure-B2 Track: QCD and Hadron Structure We present a new global QCD analysis of unpolarized and polarized data, using a Monte Carlo approach to simultaneously extract both the spin-averaged and helicity PDFs. We focus on the light quark sea asymmetries, including new data from the SeaQuest experiment and$W$-lepton production at RHIC. For the first time we extract a nonzero light quark sea asymmetry for the helicity PDFs through a QCD g ... More Presented by Mr. Christopher COCUZZA on 27 Jul 2021 at 12:20 Type: Parallel Session: QCD and hadron structure-B3 Track: QCD and Hadron Structure We present the results of a comprehensive new Monte Carlo analysis of high-energy lepton-lepton, lepton-hadron and hadron-hadron scattering data to simultaneously determine parton distribution functions (PDFs) in the proton and parton to hadron fragmentation functions (FFs). Presented by Eric MOFFAT on 28 Jul 2021 at 08:00 Type: Parallel Session: Hadron decays, production and interactions-3 Track: Hadron Decays, Production and Interactions The measurements of spectroscopy and decays of b-hadrons can provide valuable experimental input for QCD. The LHCb detector at the LHC is dedicated to heavy flavour physics. The large dataset and excellent detector performance give it unprecedented capability in searching for new b-hadron states and new decays of existing b-hadrons, and performing precision measurements on established modes. In th ... More Presented by Sara MITCHELL on 28 Jul 2021 at 07:45 Type: Leading parallel Session: Meson spectroscopy-8 Track: Meson Spectroscopy The large dataset collected in proton-proton collisions at the LHC allows precision studies on the spectroscopy of heavy hadron states, which is crucial to understand QCD dynamics and binding rules. This is possible due to high luminosity, high b/c-hadron prodution cross-section and the unique, dedicated design of the LHCb detector, optimised to reconstruct b/c-hadron decays. This talk will presen ... More Presented by Dr. Lorenzo CAPRIOTTI on 30 Jul 2021 at 11:15 Type: Parallel Session: Baryon spectroscopy-5 Track: Baryon Spectroscopy I present a complete study of the S- and P-wave baryon states with a single heavy quark content, either charm or bottom, where I show their mass spectra, and provide the radiative and strong decays allowed by the selection rules. In the end, a very good agreement between the present work and the current experimental data can be observed. Presented by Dr. Emmanuel ORTIZ PACHECO on 29 Jul 2021 at 12:20 Type: Leading parallel Session: Baryon spectroscopy-7 Track: Baryon Spectroscopy The strange quark hadrons sit at an important crossroads between the light and heavy quark hadrons, but their spectrum is comparatively poorly known. The KLF experiment was recently approved to run in Hall D of Jefferson Lab, and will use an intense secondary beam of KL mesons with the existing GlueX spectrometer to collect data several orders of magnitude larger than existing dataset. In this ta ... More Presented by Sean DOBBS on 30 Jul 2021 at 11:15 Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-4 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei Recent results and future plans of the strangeness nuclear physics experiments at J-PARC are reviewed. A Sigma-proton scattering experiment (E40) was carried out, providing high-statistics Sigma+ p and Sigma- p cross sections. An emulsion experiment (E07) found several Lambda and Xi hypernuclear events. To investigate S=-2 systems, a Xi-atomic X-ray measurement (E03) and an H-dibaryon search (E42) ... More Presented by Dr. Hirokazu TAMURA on 28 Jul 2021 at 09:25 Type: Parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates The Belle II experiment has accumulated data corresponding to 89.99 fb-1 integrated luminosity in the past 2 years, and is performing very well. We present here the analysis of B -> K J/psi pi pi and B -> K psi(2S): in the former for the first time the evidence for the X(3872) --->Jpsi pi pi has been found at Belle II, which is consistent with the observation at Belle of the same resonant state. Presented by Elisabetta PRENCIPE on 28 Jul 2021 at 07:25 Type: Parallel Session: Baryon spectroscopy-4 Track: Baryon Spectroscopy We study the photoproduction of the$N(1440)$resonance in$\gamma^{\ast}p\to N^{\ast}$process in quark models, where the$N(1440)$takes different wave functions: First radial excitation of the nucleon imported from low-lying baryon mass spectrum calculations, a general radial excitation of the nucleon, and a$q^3$state with positive parity. The comparisons between the theoretical results and ... More Presented by Mr. Attaphon KAEWSNOD on 28 Jul 2021 at 11:35 Type: Parallel Session: Analysis tools-3 Track: Analysis Tools We report results from a study of hadronic transitions of the$\chi_{bJ}(nP)$states of bottomonium at Belle. The P-wave states are reconstructed in transitions to the$Upsilon(1S)$with the emission of an$\omega$meson. The transitions of the n=2 triplet states provide a unique laboratory in which to study NRQCD, as the kinematic threshold for production of an$\omega$and$\Upsilon(1S)$lie ... More Presented by Zachary STOTTLER on 28 Jul 2021 at 08:25 Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-2 Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei We study how to include bound states in a thermal gas in the context of quantum field theory (QFT). We have used a scalar QFT with a$\phi^4$interaction where the field$\phi$represents a particle with mass$m$. We observe the creation of bound states when the coupling constant is negative and its modulus is larger than a certain critical value. Then we investigate the contribution of this bound ... More Presented by Dr. Subhasis SAMANTA on 27 Jul 2021 at 12:23 Type: Leading parallel Session: Exotic hadrons and candidates-4 Track: Exotic Hadrons and Candidates Using 980 fb$^{−1}$data collected with the Belle detector, the two-photon process$\gamma\gamma\to\gamma\psi(2S)$is studied for the first time in an effective center-of-mass energy between 3.7 and 4.2 GeV. A clear evidence is observed for a structure in the$\gamma\psi(2S)$mass distribution at$3921.3\pm2.4\pm1.6$MeV/$c^{2}$, while hint is found for another structure around 4000 MeV/$c^{2}$. ... More Presented by Yoshiki TERAMOTO on 28 Jul 2021 at 09:00 Type: Parallel Session: Meson spectroscopy-6 Track: Meson Spectroscopy Using a variational approach we calculate the mass spectra of the bottom mesons in the framework of the phenomenological quark anti-quark potential. Decay constant and Leptonic decay widths of the bottom mesons are also calculated. The obtained results are compared with the available experimental data and other theoretical predictions. Presented by Dr. Zahra GHALENOVI on 29 Jul 2021 at 12:20 Type: Parallel Session: Exotic hadrons and candidates-7 Track: Exotic Hadrons and Candidates The mass of tetraquark states of all$qq\bar q\bar q$,$qc\bar q \bar c$, and$cc\bar c \bar c$quark configurations are evaluated in a constituent quark model, where the Cornell-like potential and one-gluon exchange spin-spin coupling are employed. Three mass-dependent coupling parameters are proposed, and all model parameters are predetermined by comparing the theoretical and experimental masses ... More Presented by Mr. Zheng ZHAO on 30 Jul 2021 at 10:05 Type: Parallel Session: Meson spectroscopy-3 Track: Meson Spectroscopy In e+e- collisions between 2 and 3 GeV, excited states of rho, omega and phi can be produced directly. Especially the resonances around 2GeV like rho(2000), rho(2150) and \phi(2170) are not fully understood yet. Theorists describe the phi(2170) as a traditional s s-bar state, an s s-bar g hybrid, a tetraquark state, a Lambda Lambda-bar bound state, or a phi KK resonance. The predicted decay ... More Presented by Lei XIA Type: Parallel Session: Meson spectroscopy-5 Track: Meson Spectroscopy We perform Dalitz plot analysis of$\eta_c$decays to$\eta'K^+K^-$,$\eta'\pi^+\pi^-$, and$\eta\pi^+\pi^-$, based on a data sample of ~470 fb$^{-1}$collected by the BABAR experiment at the PEP-II collider. We measure the parameters of$K_0^\ast(1430)$and$K_0^\ast(1950)$and observe production of$\sigma(600)$,$f_0(1400)$and$f_0(1710)$resonances. We observe new resonances decaying to$\pi ... More
Presented by Dr. Alessandro PILLONI on 28 Jul 2021 at 12:40
Type: Parallel Session: QCD and hadron structure-B3
Transverse momentum dependent fragmentation functions (TMD FF's) characterize multi-dimensional hadronization processes and their flavor dependence within jets. The LHCb experiment forward spectrometer offers a unique opportunity to measure with great precision hadronization variables $j_T$, z and r in TMD FF's. This talk will present results for measurements of nonidentified hadrons within light ... More
Presented by Jordan Daniel ROTH on 28 Jul 2021 at 07:40
Type: Parallel Session: Exotic hadrons and candidates-1
The ALICE Collaboration has carried out measurements of K$^0_{\rm S}$K$^{\rm \pm}$ interactions with pp collisions at $\sqrt{s}=7$ TeV and Pb--Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV to study the $a_0(980)$ meson, which is a tetraquark candidate, using the method of two-particle femtoscopy. Using a simple geometric argument, our results are found to be compatible with the interpretation of ... More
Presented by Prof. Thomas HUMANIC on 26 Jul 2021 at 12:00
Type: Parallel Session: Hadron decays, production and interactions-6
Track: Hadron Decays, Production and Interactions
The $\rm\overline{K}N$ interaction, due to the residual strong force, is very different within the distances typical for an atomic nucleus. At about the nucleon size it has significant contributions from resonances and threshold effects which vanish with increasing distance. By selecting collisions from pp (1 fm) to Pb--Pb (5-9 fm) we can choose the average $\rm\overline{K}p$ distance and carry ou ... More
Presented by Dr. Łukasz GRACZYKOWSKI on 29 Jul 2021 at 12:20
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-4
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
In this presentation I will report on an ongoing project, attempting to simulate pA reactions in which the $\phi$ meson is produced in nuclei, making use of a transport approach [1]. Comparisons between obtained dilepton spectra and experimental data of the E325 experiment at KEK [2] will be made and an outlook for the ongoing E16 experiment at J-PARC will be given. [1] W. Cassing and E.L. Brat ... More
Presented by Dr. Philipp GUBLER on 28 Jul 2021 at 10:08
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-3
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
A momentum-independent symmetry preserving vector-vector contact interaction helps to study different observables of light mesons and baryons. It can be extended to study heavy and heavy-light mesons and baryons too. We study how the quark gap equation is affected if we change the number of colors and flavors, or under the effects of finite temperature and magnetic field? In particular, we present ... More
Presented by Dr. Marco Antonio BEDOLLA on 28 Jul 2021 at 08:08
Type: Parallel Session: Hadrons in Hot and Nuclear Environment Including Hypernuclei-3b
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
The ratio of the transverse to longitudinal polarization-transfer components in the A(e⃗,e'p⃗) reaction is proportional to the proton EM form factor (FF) ratio. This allows us to study bound proton's EM structure. I will present experiments searching for in-medium modification of EM FF ratio carried out on protons from different nuclei including our last experiment where we explore the influen ... More
Presented by Mr. Tim for A1 Collaboration, Mainz KOLAR on 28 Jul 2021 at 07:36
The Leding-Logarithmic (LL) gluon Sudakov formfactor is derived from rapidity-ordered BFKL evolution with longitudinal-momentum conservation. This derivation further clarifies the relation between High-Energy and TMD-factorizations and can be extended beyond LL-approximation as well. Implications for rapidity anomalous dimensions and collinear matching functions of TMD-factorization will be discus ... More
Presented by Dr. Maxim NEFEDOV on 27 Jul 2021 at 12:05
Type: Parallel Session: Analysis tools-3
Track: Analysis Tools
A new database is under construction to offer a complete collection of published information on hypernuclei. A key aspect is the combination of measurements to average values in a systematic manner together with a proper treatment of errors. The focus lies on lifetimes, Lambda binding energies and excitations of hypernuclei. The capability of the database will be demonstrated for the case of th ... More
Presented by Mr. Philipp ECKERT on 28 Jul 2021 at 07:45
Type: Parallel Session: Analysis tools-5
Track: Analysis Tools
The J-PET detector is the only device which enables determination of polarization of photons from positronium annihilation together with estimation of positronuium spin axis on the event-by-event basis. With first measurements demonstrating such capabilities we are able to reach the precision of CP and CPT tests at permill level. In the talk we will describe experimental techniques and new results ... More
Presented by Dr. Sushil SHARMA on 28 Jul 2021 at 12:20
Type: Parallel Session: Analysis tools-4
Track: Analysis Tools
In a recent study, we have studied the strong decays of \phi(2170) to final states involving the kaonic resonances K(1460), K_1(1270), and K_1(1400), motivated by the publication of data by BESIII. We consider a phi-f_0(980) molecular nature for \phi(2170) and find results in agreement with the data. In this talk, besides giving the details on our study of \phi(2170), I will show that the intera ... More
Presented by Prof. Alberto MARTINEZ TORRES on 28 Jul 2021 at 10:05
Type: Parallel Session: Meson spectroscopy-8
Track: Meson Spectroscopy
We compute the $\Psi/3770) \to \gamma D \bar D$ decay, for both the $D^+ D^-$ and $D^0 \bar D^0$ decays. The $\Psi(3770) \to \gamma D^0 \bar D^0$ transition to go through a loop involving the $D^+ D^- \to D^0 \bar D^0$ scattering amplitude. We take the results for this amplitude from a theoretical model that predicts a $D \bar D$ bound state and find a $D^0 \bar D^0$ mass distribution in t ... More
Presented by Dr. Genaro TOLEDO on 30 Jul 2021 at 12:05
Type: Parallel Session: Exotic hadrons and candidates-5
The existence of the recent $Z_{cs}(3985)^-$ can be expected from the well-established $Z_c(3900)$ and $Z_c(4020)$ states using SU(3) flavor symmetry. In this talk, we study the $Z_{cs}$ structure in a coupled-channels calculation, in the framework of a chiral constituent quark model which was used to explain the $Z_c$ structures. We are able to reproduce the $K^+$ recoil-mass spectrum without any ... More
Presented by Dr. Pablo G. ORTEGA on 28 Jul 2021 at 12:20
Type: Parallel Session: QCD and hadron structure-B4
We present a study of the transverse momentum parton distribution function of the pion, from pion-induced Drell-Yan (DY) lepton-pair production with existing data. We confront the impact of matching the high-transverse momentum collinear fixed order perturbative QCD pT with the low-pT TMD spectrum using using TMD factorization formalism on extracting the pion pdfs and TMDs. A Monte Carlo QCD g ... More
Presented by Prof. Leonard GAMBERG on 28 Jul 2021 at 10:25
Type: Parallel Session: Analysis tools-5
Track: Analysis Tools
The ATLAS detector started in 2018 the preparations for an ambitious physics project, aiming the exploration of rare processes and extreme phase spaces, an endeavor that will require a substantial increase in the integrated luminosity. A comprehensive upgrade of the detector and associated systems was devised and planned to be carried out in two phases. This presentation will summarize the expecte ... More
Presented by Sandra LEONE on 28 Jul 2021 at 11:40
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Protons are understood as states of quarks and gluons bound by the strong force, but the dynamics that form a proton from quarks and gluons is poorly understood. Contrary to naive assumptions, there is an asymmetry between d and u anti-quarks. This asymmetry cannot arise from pQCD and demonstrates a fundamental anti-quark component in the proton. SeaQuest has measured the deuterium to hydrogen Dre ... More
Presented by Dr. Paul E REIMER on 26 Jul 2021 at 07:00
Type: Parallel Session: Baryon spectroscopy-6
Track: Baryon Spectroscopy
The electromagnetic properties are obtained from the measurements of magnetic moments and spin flavor wave-functions which can provide valuable insight into the underlying dynamics and the non-perturbative aspects of QCD. We also identify the weak decays like semi leptonic decays for the particular channels. The obtained results are compared with available theoretical predictions.
Presented by Dr. Zalak SHAH on 30 Jul 2021 at 10:25
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Understanding the properties of nuclear matter and its emergence through the underlying partonic structure and dynamics of quarks and gluons requires a new experimental facility in hadronic physics known as the Electron-Ion Collider (EIC). This presentation will highlight the EIC science program the unique collider and experimental equipment needed to realize the science program and discuss th ... More
Presented by Dr. Elke-Caroline ASCHENAUER on 27 Jul 2021 at 09:35
Type: Leading parallel Session: Hadrons in hot and nuclear environment including hypernuclei-5
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
The Multi-Purpose Detector is constructed at Joint Institute for Nuclear Research at NICA Complex. MPD will study the phase diagram of QCD matter at maximum baryonic density, the phase transition between the deconfined and hadronic matter and the critical point. The status of the production and assembly of the detector will be reported on. Design performance for measurement of spectra of id ... More
Presented by Prof. Adam KISIEL on 28 Jul 2021 at 11:15
Type: Parallel Session: QCD and hadron structure-B5
SPD is an international Collaboration gathering around the Spin Physics Detector at the NICA Collider, under construction at JINR, in Dubna. The collision of high luminosity polarized proton and deuteron beams with total energy up to 27 GeV, will open unique opportunities for a wide research program including the spin structure of light nuclei, the proton gluon content and the spin dependence of t ... More
Presented by Prof. Egle TOMASI-GUSTAFSSON on 28 Jul 2021 at 11:40
We describe an analysis comparing the $p\bar{p}$ elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96~TeV to that in $pp$ collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections, extrapolated to a center-of-mass energy of $\sqrt{s} =$ 1.96 TeV, are compared with the D0 measure ... More
Presented by Prof. Christophe ROYON on 27 Jul 2021 at 11:15
Type: Parallel Session: Exotic hadrons and candidates-6
We present a recent investigation on the production of $P_{cs}(4459)$ in the exclusive $K^-p\to J/\psi\Lambda$ reaction using both the effective Lagrangian and Regge approaches. We assume six different spin and parity assignments, i.e., $1/2^\pm$, $3/2^\pm$ and $5/2^\pm$ to the newly found $P_{cs}$. The total and differential cross sections for the $K^-p\to J/\psi\Lambda$ reaction are calculated. ... More
Presented by Mr. Samson CLYMTON on 29 Jul 2021 at 12:20
Type: Parallel Session: QCD and hadron structure-A7
Whether a mass gap occurs in QCD, and therefore DCSB leading to constituent masses, depends on the DSE kernel. One crucial ingredient is the quark-gluon vertex whose structure is complex once dressed with gluons. We use QCD gauge identities and multiplicative renormalizability to derive the form factors of the vertex and combine them with lattice QCD gluon and ghost propagators. Solving numericall ... More
Presented by Prof. Bruno EL-BENNICH on 30 Jul 2021 at 09:45
Type: Leading parallel Session: Meson spectroscopy-2
Track: Meson Spectroscopy
For the first time, we map out the energy dependence of the elastic Isospin-1/2 D$\pi$ scattering amplitude and find a complex $D_0^*$ resonance pole, using Lattice QCD with a pion mass $m_{\pi}=239$ MeV. The resonance, which is lighter than the $D_{s0}^⋆$ found on the same lattice, is strongly coupled to the S-wave $D\pi$ channel. We find that both $q\bar{q}$- and $D\pi$-like constructions are ... More
Presented by Mr. Nicolas LANG on 27 Jul 2021 at 11:40
Type: Invited plenary Session: Plenary
Track: Invited Plenary
In this talk, we will present a coupled-channel analysis of the $J/\psi p$ spectrumn, in which the $P_c$ states are treated as $\Sigma_c^{(*)}\bar{D}^{(*)}$ molecules. The effective potentials involve both the contact potentials and OPE and their renormalization group behaviour is investigated. The approach yields a very good description of the data. A narrow state around 4.38 GeV associated with ... More
Presented by Dr. Meng-Lin DU on 26 Jul 2021 at 09:35
Type: Leading parallel Session: Baryon spectroscopy-1
Track: Baryon Spectroscopy
We conduct a study of the interaction of the K¯ Ξ, ηΩ(s-wave), and K¯ Ξ(d-wave) channels within a coupled channel unitary approach where the transition potential between the K¯ Ξ and ηΩ channels is obtained from chiral Lagrangians. We find that all data including the recent Belle experiment on Γ(Ω→πK¯ Ξ)/Γ(Ω→K¯ Ξ), are compatible with the molecular picture stemming from m ... More
Presented by Prof. Eulogio OSET BAGUENA on 26 Jul 2021 at 11:40
Type: Leading parallel Session: Baryon spectroscopy-1
Track: Baryon Spectroscopy
Belle collaboration measured the ratios of the branching fractions of the newly observed Omega(2012) excited state.We revisit the Omega(2012) from the molecular perspective where it appears to be a dynamically generated state with spin−parity 3/2- from the coupled channels interactions of the Kbar Xi(1530) and eta Omega and Kbar Xi. With the model parameters, it is shown that the ratio of these ... More
Presented by Ju-Jun XIE on 26 Jul 2021 at 11:15
Type: Parallel Session: Hadron decays, production and interactions-1
Track: Hadron Decays, Production and Interactions
The PrimEx-eta experiment at Jefferson Lab is aiming to measure the radiative decay width of the eta with a 3.2% precision. This projected accuracy will ameliorate the calculation of all eta partial decay widths. It will provide a critical input to determine the eta-eta' mixing angle and the light quark mass ratio model independently. The first run was performed with the GlueX experimental setup i ... More
Presented by Igal JAEGLE on 26 Jul 2021 at 12:20
Type: Parallel Session: Meson spectroscopy-1
Track: Meson Spectroscopy
A coupled-channel analysis of data on radiative $J/\psi$ decays constrained by further data reveals the existence of ten scalar isoscalar resonances. Five seem to be mainly SU(3) singlet, five mainly octet states. Pure octet mesons should not be produced in radiative $J/\psi$ decays. But their yield is significant and peaks at 1865 MeV with no background. Singlet mesons are produced over a wide ... More
Presented by Prof. Eberhard KLEMPT on 26 Jul 2021 at 12:25
Type: Leading parallel Session: Analysis tools-2
Track: Analysis Tools
Within the framework of the massive O($N$) nonlinear sigma model extended to the next-to-leading order in the chiral counting (for $N=3$ corresponding to the two(-quark)-flavour Chiral Perturbation Theory), we calculate the relativistic six-pion scattering amplitude at low energy up-to-and-including terms $\mathcal{O}(p^6)$. The result for the four-pion amplitude in the case of $N$ (meson) flavou ... More
Presented by Tomas HUSEK on 27 Jul 2021 at 12:30
Type: Leading parallel Session: Baryon spectroscopy-1
Track: Baryon Spectroscopy
We study the two step sequential one pion production mechanism,$np(I=0)\to\pi^−pp$, followed by the fusion reaction $pp\to\pi^+d$,to describe the $np\to\pi^+\pi^−d$ reaction where a narrow peak has been identified with a “d(2380)” dibaryon. We find that the second step $pp\to\pi^+d$ is driven by a triangle singularity.Without invoking a dibaryon, the combined cross sections produce a narro ... More
Presented by Dr. Raquel MOLINA PERALTA on 26 Jul 2021 at 12:30
Type: Invited plenary Session: Plenary
Track: Invited Plenary
The weak charge of the proton
Presented by Prof. Wouter DECONINCK on 29 Jul 2021 at 07:35
Type: Parallel Session: Exotic hadrons and candidates-6
We have studied the $e^+ e^- \to K^+ ( D_s^{*-} D^0 + D_s^- D^{*0})$ reaction[1] recently measured at BESIII, from where a new exotic $Z_{cs}$ state has been reported. We study the interaction of $\bar D_s D^*$ with the coupled channels. Although our picture does not produce a bound state nor resonance, the interaction of the coupled channels has sufficient strength to produce the enhancement clo ... More
Presented by Dr. Natsumi IKENO on 29 Jul 2021 at 11:40
I will present a brief summary of the main theoretical properties of the three-gluon vertex, and will discuss some of the most interesting phenomenological applications that require it as input.
Presented by Dr. Joannis PAPAVASSILIOU on 26 Jul 2021 at 11:15
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-3
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
Recent observations of gravitational waves of neutron stars have been providing important insights about the equation of state (EoS) of dense matter. The mass and radius from this data suggests that sound velocity can be greater than its conformal value, $c_s^2 \leq 1/3$. We consider that Quarkyonic Matter naturally explains this behavior. We suggest a model of hard core nucleon interactions in an ... More
Presented by Mr. Saul Fernando HERNANDEZ ORTIZ on 28 Jul 2021 at 07:50
Type: Parallel Session: Meson spectroscopy-5
Track: Meson Spectroscopy
Hadron scattering information can be accessed indirectly from lattice QCD by computing the spectrum of multi-hadron states and connecting to the infinite volume amplitudes via quantization conditions. This methodology was applied successfully for the two-hadron case to extract phase-shifts and resonance parameters. Only recently this methodology was extended to the three-hadron sector: both lattic ... More
Presented by Andrei ALEXANDRU on 28 Jul 2021 at 11:40
Type: Invited plenary Session: Plenary
Track: Invited Plenary
Lattice QCD already offers the possibility of extracting three-hadron scattering quantities from first principles. In the last few years, significant progress has been made in developing and applying the three-body formalism. We are now able to treat physically relevant systems of three mesons, including resonances, bound states and decays. I will review the status of the approach and comment on r ... More
Presented by Mr. Fernando ROMERO-LOPEZ on 29 Jul 2021 at 09:00
Type: Leading parallel Session: Meson spectroscopy-5
Track: Meson Spectroscopy
I present a lattice-QCD calculation of the max-isospin,3-pion scattering amplitude (3pi+to3pi+).The calculation combines finite-volume energies with a relativistic field-theoretic formalism,required to interpret the results.I will describe the full work-flow required to reach the final amplitude,implemented here for the first time, and discuss the complicated singularities appearing in the latter. ... More
Presented by Maxwell HANSEN on 28 Jul 2021 at 11:15
Type: Parallel Session: Analysis tools-4
Track: Analysis Tools
Baryon amplitude analyses are an essential tool in particle physics; not only for spectroscopic studies but also for heavy baryon polarisation measurements. This talk will present the methods and the tools required for performing full phase space amplitude analyses with extraction of baryon polarisation, taking the $\Lambda^+_c \to p K^- \pi^+$ decay as an example; particular emphasis will be give ... More
Presented by Dr. Daniele MARANGOTTO on 28 Jul 2021 at 09:45
The collinear factorization theorem, combined with finite-order calculations in perturbative QCD, provides a powerful framework to obtain predictions for many collider observables. However, for observables which involve multiple energy scales, transverse degrees of freedom cannot be neglected, and finite-order perturbative calculations have to be combined with resummed calculations to all orders i ... More
Presented by Dr. Aleksandra LELEK on 28 Jul 2021 at 09:00
Type: Parallel Session: Hadrons in hot and nuclear environment including hypernuclei-6
Track: Hadrons in Hot and Nuclear Environment Including Hypernuclei
For a long time, hypertriton is expected to possess a similar lifetime as free Λ hyperon. However, several recent heavy-ion based experiments reported surprisingly shorter lifetime (up to ~40%) for 3ΛH mesonic weak decay. As an independent and complementary approach of the existing experiments, we proposed a new measurement for 3ΛH lifetime with 3He(K-, pi0)3ΛH reaction as J-PARC E73 experimen ... More
Presented by Dr. Yue MA on 29 Jul 2021 at 12:23
Type: Parallel Session: QCD and hadron structure-B8
We study Semileptonic $B_s$-meson decay ($B_s\rightarrow$ $K$ $l^+\nu_l$) using Covariant Confined Quark Model (CCQM) which has built-in infrared confinement. The transition form factors are calculated using CCQM in entire range of physical momentum transfer. They can be further utilized to compute the branching fractions of $B_s$ meson. Our preliminary results for form factors $f_+ (0)$ and $A_+ ... More Presented by Mr. Akshay GADARIA on 30 Jul 2021 at 11:55 Type: Parallel Session: Baryon spectroscopy-5 Track: Baryon Spectroscopy We provide a unified method to calculate and also the results of the Transverse Momentum Dependent parton distribution functions (TMDs) of both the electron and the proton within the Basis Light-front Quantization (BLFQ) framework using the non-perturbative light-front wave functions. This method can be extended to meson TMDs, as well as the investigation of spin asymmetries. Presented by Mr. Zhi HU on 29 Jul 2021 at 12:40 Type: Parallel Session: QCD and hadron structure-A3 Track: QCD and Hadron Structure We present a recent investigation on the transverse charge and energy-momentum tensor distributions of the nucleon. We show how the Abel transform interpolates the three-dimensional distributions in the Breit frame to the two-dimensional transervse distributions in the infinite momentum frame. We also discuss how the charge distributions of the nucleon at rest can be boosted to those in the infini ... More Presented by Prof. Hyun-Chul KIM on 28 Jul 2021 at 08:20 Type: Leading parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates If the X(3872) is a weakly bound charm-meson molecule, it can be produced by the creation of$D^* \bar D^*$at short distances followed by the rescattering of the charm mesons into X(3872) and a photon or a pion through a triangle loop. A triangle singularity produces narrow peak in the reaction rate in production of X(3872). The observation of this peak would provide strong evidence in support of ... More Presented by Liping HE on 28 Jul 2021 at 07:00 Type: Parallel Session: Hadron decays, production and interactions-6 Track: Hadron Decays, Production and Interactions Employing the covariant baryon chiral perturbation theory, we calculate the LO and NLO two-pion exchange (TPE) contributions to NN interaction up to order O(p3). We compare the so-obtained NN phase shifts with those obtained in the nonrelativistic baryon chiral perturbation theory, which allows us to check the relativistic corrections to the medium-range part of NN interactions. We show that relat ... More Presented by Mr. Yang XIAO on 29 Jul 2021 at 12:00 Type: Leading parallel Session: Analysis tools-2 Track: Analysis Tools We will discuss non-perturbative descriptions of three-body decays in hadronic systems and their application to parameterize physics beyond the Standard Model. First, we apply a novel implementation of three-body unitarity, based on a Bethe-Salpeter ansatz, to$\omega/\phi\to 3\pi$and compare the results to the established dispersive framework of Khuri-Treiman equations on a quantitative level. W ... More Presented by Mr. Mehmet Hakan AKDAG on 27 Jul 2021 at 12:05 Type: Leading parallel Session: QCD and hadron structure-A4 Track: QCD and Hadron Structure In this talk, we show how the 3-dimensional partonic structure of nuclear targets can be accessed in deeply virtual Compton scattering processes. The proper planning of these experiments at Jefferson Lab and at the future Electron-Ion Collider requires Monte Carlo (MC) event generators able to account for the exact treatment of nuclear effects. After a description of such models for the$^4\$He nuc ... More
Presented by Dr. Sara FUCINI on 28 Jul 2021 at 09:00
We perform analyses of the 3D gluon content of the proton via a study of polarized twist-2 gluon TMDs, calculated in a spectator model for the parent nucleon. Our approach encodes a flexible parametrization for the spectator-mass density, suited to describe both moderate and small-x effects. All these developments are relevant in the investigation of gluon dynamics inside nucleons and nuclei, whic ... More
Presented by Dr. Francesco Giovanni CELIBERTO on 28 Jul 2021 at 11:15
Type: Parallel Session: Exotic hadrons and candidates-4
Observation of e+ e- -> eta psi(2S) at the center-of-mass energies from 4.236 to 4.600 GeV;  Cross section measurement of e+ e- -> p pbar eta and e+ e- -> p pbar omega at center-of-mass energies betweeen 3.773 GeV and 4.6 GeV; Study  of e+ e- -> 2(p anti-p) at center-of-mass energies between 4.0 and 4.6 GeV; Search for the reaction channel e+ e- -> eta_c eta pi+ pi- at center-of-mass energies fr ... More
Presented by Weimin SONG on 28 Jul 2021 at 09:25
Type: Parallel Session: QCD and hadron structure-A3