Event calendar file
28-30 May 2018
ICN-UNAM
Mexico/General timezone
- ericvj@fisica.unam.mx
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In this talk I present a brief overview on different ways to extend the
Standard Model through the addition of symmetries, both discrete and
continuous, the use of renormalization group invariants that lead to scale
invariance,
and the constant comparison with data on masses and mixings of the fundamental
fermions.
The Belle II experiment first collision was successfully accomplished in April 25th 2018 this is a major milestone in the physics program, in this talk I will present the status and plans of these stage, the so called, phase II run. I will focus in the activities of the Mexican group such as the LABM and the TAU physics.
Presented by Pedro PODESTA
En esta platica comentaremos sobre el modelo de un boson
ultraligero como la partícula de materia oscura, modelo que es conocido en
la literatura con diversos nombres: scalar field dark matter, Fuzzy dark
matter, ultra-light axion, etc. Presentaremos resultados de publicaciones
recientes sobre el uso de diversas observaciones, cosmológicas y
astrofísicas, para imponer restricciones a la ma
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The contributions to the chromo magnetic dipole moment (CMDM) and chromo electric dipole moment (CEDM) of the top quark are calculated at the one-loop level in the framework of the two-Higgs doublet model with four fermion generations (4GTHDM), which is still consistent with experimental data and apart from new scalar bosons and fermions predicts new sources of $CP$ violation via the extend
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Presented by Mr. Alan Ignacio HERNÁNDEZ JUÁREZ
In this work we report on the construction and performance (efficiency) of a
multi-gap resistive plate chamber (MRPC) consisting of a stack of 6 parallel thin
glass plates (thickness of 400μm). We followed the construction procedure of the
chambers which were designed for the ALICE Time-Of-Flight detector [1]. Spacers
(fishing line) between the resistive plates define a series of gas gaps of
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Almost seventy years since Fermi and his contemporaries proved the potential of supernovae to produce the Galactic cosmic rays, laying the basis of the current standard model, the origin of cosmic rays remains a vigorous field of research. Novel instruments that entered operations in the last decade have provided a deep insight into high-energy gamma-ray sources, tracing astrophysical particle acc
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Presented by Dr. Alberto CARRAMIÑANA
In pursuit of the sketching the effective magnetized QCD phase diagram, we found conditions on the critical coupling for chiral symmetry breaking in the Nambu-Jona-Lasinio model in a nontrivial thermo-magnetic environment. Critical values for the plasma parameters, namely, temperature and magnetic field strength for this to happen are hence found in the mean field limit. The magnetized phase diagr
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Presented by Mr. Angelo MARTÍNEZ
La naturaleza de la materia oscura es aún un enigma a pesar del gran interés científico que ha despertado en las últimas tres décadas. Su detección es fundamental para explicar cuestiones como la formación y evolución de galaxias y corroborar las predicciones del modelo estándar cosmológico. Por otro lado, el neutrino es una partícula que puede brindar valiosa información sobre fenóme
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Presented by Mr. Ariel ZUÑIGA REYES
La presencia de una sobre población de enanas blancas, compuestas casi exclusivamente por helio, ha sido reportada en diversos cúmulos globulares (Sewigart et al., 2002, Strickler et al., 2009, Hansen 2002). Este trabajo analiza, en base a la evidencia observacional, la posibilidad de que estas enanas blancas de helio se formen debido a una desviación en el diagrama HR de estrellas de baja masa
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Presented by Dr. Santiago ARCEO
We perform an effective field theory analysis of the tau to pi pi nu_tau decays, that includes the most general interactions between SM fields up to dimension six, assuming massless neutrinos. As a result, we set precise bounds on non-standard scalar and tensor interactions and show how Dalitz plots in Mandelstam variables and the tau-pi^- angle, together with the measurement of the forward-backwa
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Presented by Mr. Jesús Alejandro MIRANDA HERNÁNDEZ
Se estudiaron los espectros de energía obtenidos al exponer un CCD de Si a una fuente de
252Cf. Los neutrones provenientes de la fuente interactúan vía dispersión elástica con los núcleos en el CCD, los cuales, en su retroceso, pueden presentar canalización dependiendo de su energía, del ángulo de salida de su sitio en la red cristalina y del eje o plano cristalográfico por el que se m
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Presented by Mrs. Brenda Aurea CERVANTES VERGARA
In this work, we study the flavor symmetries associated to phenomenologically viable models in abelian toroidal orbifolds of the $E_8\times E_8$ heterotic string, including those with roto-translations. We study the breaking of non-abelian flavor symmetries groups when Wilson lines are present in those models and focus on models where the MSSM is a possibility; with that in mind, we make a scan an
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Presented by Olguín Trejo YESSENIA
The U(1)B-L extension of the Standard Model predicts an additional neutral boson Z' plus a heavy Higgs boson H, and contemplates the neutrino mass with the appearance of three additional heavy Majorana neutrinos, one per family. Within this context we study the phenomenology, of light and heavy Higgs at future e+e− linear colliders with center-of-mass energies of √𝑠 = 500 – 3000 GeV and i
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Presented by Prof. FRANCISCO RAMIREZ-SANCHEZ
A Lagrangian formalism of second order in the momenta has been elaborated that allows to describe the $(j,0)+(0,j)$ high spin carrier spaces of the Lorentz- group as either Lorentz , or, spinor tensors strictly describíng single spins without auxiliary conditions. The correct number of degrees of freedom and their irreducibility are identified by properly designed momentum independent projecto
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Presented by Mr. Victor BANDA
In this work we describe an emerging inter-institutional, multidisciplinary collaboration encompassing five Mexican institutions, focusing on the development of Mexican accelerator science and technology. Due to the complexity of such machines, the simultaneous and synergetic work of people from several different disciplines is required. In the case of Mexico, this collaboration aims at sharing
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Presented by Dr. Karla CANTÚN
We revisit the computations of X. Y. Pham (tau to 3 mu, Eur.Phys.J. C8 (1999) 513-516) and S. T. Petcov (mu to 3 e, Sov.J.Nucl.Phys. 25 (1977) 340, Erratum in 698) of L to l' l+ l- LFV decays in the SM with massive neutrinos. Pham obtained an unexpectedly large tau to 3 muons branching ratio (~1E-14) as a result of a seeming IR divergence (a logarithmic term in neutrino masses, without its coeffi
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Presented by Gerardo HERNÁNDEZ-TOMÉ
In this work, the photon horizon including LIV is studied by correcting the pair-production interaction of gamma-ray with the Cosmic Background Light. The derived scenarios are used to predict important changes in the propagation of photons with energy greater than 10 ^ 18 eV. We have computed the GZK photon flux on Earth for several ultra high energy cosmic ray source (UHECR) models and we compar
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Presented by Dr. Humberto MARTÍNEZ
Scintillation efficiency of low-energy nuclear recoils in noble liquids plays a crucial role in interpreting results from some direct searches for Weakly Interacting Massive Particle (WIMP) dark matter. With respect to other noble liquid targets, liquid argon exhibits a powerful rejection of electronic recoil backgrounds (>108 discrimination power) through the temporal pulse shape of the scintilla
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Presented by Mr. Angel Michell MARTINEZ MENDOZA
The Tracking Ultraviolet Setup (TUS) belong to the new generation of Extreme Energy Cosmic Rays (EECRs) space detectors; it is on board of the Lomonosov Satellite launched in 2016. It has a concentrator mirror of 2 square meters and a 256 photomultiplier tubes camera. This experiment has several goals: the detection of EECRs from space; meteorite tracks among others luminous phenomena in the upper
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Presented by Oliver Isac RUIZ HERNANDEZ
The MATHUSLA detector will be a unique instrument that will extend and complement the searches for physics beyond the Standard Model at the LHC. The detector will consist of a large-volume tracking detector (horizontal surface of $200 \times 200 \, m^2$ and high of $20 \, m$) that will allow to search for the decay of exotic, neutral, long-lived particles which might be produced in TeV proton-prot
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Presented by Dr. Juan Carlos ARTEAGA VELAZQUEZ
In this work we analyze the resulting RGE running of couplings of additional U(1) appearing in MSSM-like models coming from orbifold compactifications of heterotic strings. We calculate the coefficients of the beta function to obtain the values of the coupling constant of the additional Z' in the unification scale MGUT and Z' breaking scale, both as a functions of MGUT. We indicate the first most
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Presented by Mr. Ricardo PÉREZ
En este trabajo se examina el posible uso de las oscilaciones de neutrinos en materia como una herramienta auxiliar en el estudio de la composición del interior de la Tierra. Los neutrinos producidos en la atmósfera atraviesan la Tierra y sufren oscilaciones que son afectadas por la densidad de los electrones en la materia terrestre. La próxima generación de experimentos con neutrinos atmosfé
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Presented by Mr. José Arnulfo HERRERA LARA
In this talk we provide a brief review of recent developments in the study
of the quark-gluon plasma produced in heavy ion collisions. We highlight the
role of QCD-initiated processes and QCD hard probes as means of access to
flow, energy-loss and transport properties of this plasma. Finally, we will
report on the MexNICA collaboration efforts to study the QCD phase diagram
using the Nuclotro
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The CMS experiment has a wide program on heavy flavor physics, covering production and decay properties of B hadrons and quarkonia, as well as searches and study of exotic hadrons, and rare decays. In this talk, we present precise measurements of B hadron lifetimes, that are good as or better than previous measurements. Recent measurements of the Lambda_b polarization and angular parameters in Lam
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Presented by Dr. Ivan HEREDIA DE LA CRUZ
We study the particle production at high transverse momentum
($p_{\rm T} < 8$ GeV/c) in both pp and Pb-Pb collisions at the LHC energies. The $p_{\rm T}$ distributions of charged particles in pp collisions are know to obey the so-called $x_{\rm T}$-scaling which is a feature of pQCD hard processes. Therefore, the characterisation of the spectra is done using a power-law function and the resulti
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Presented by Dr. Aditya Nath MISHRA
We describe the decay of a pseudo-scalar meson into two leptons and another pseudo -scalar
meson (M 1 → lepton 1 lepton 2 M 2 ) driven by the presence of a majorana neutrino. In addition to
the known results in the literature, we provide a detailed analysis of the role of the different channels
as a function of the majorana neutrino mass, we pay particular attention to the interference betwee
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Presented by Mr. Marxil SÁNCHEZ GARCÍA
The Pontryagin density can be defined for any connection theory and has played an important role in modern physics. We briefly recall some of its previous applications and emphasize its recent emergence in non-dynamical axion electrodynamics, as an effective theory describing the electromagnetic response of topological insulators. The static Green's functions are obtained for the cases of plane
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Recent results on the $\gamma^{*}\gamma\to\pi^{0}$ transition form factor are
presented on the entire domain of spacelike momenta using the SDE-BSE
approach to hadron physics. The result agree with data obtained by
the CELLO, CLEO, and Belle Collaborations. The approach unifies this
prediction with that of the pion parton distribution amplitude and elastic
electromagnetic form facto
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Presented by Dr. Javier COBOS-MARTINEZ
We present recent results on the development of transverse momentum dependent splittings kernels which generalize both BFKL and DGLAP evolution kernels. We provide a short discussion of the underlying theoretical framework and discuss possible improvements in theoretical precision for the description of the LHC events.
Presented by Dr. Martin HENTSCHINSKI
Two-particle correlation studies provide important insights into the underlying mechanism of particle production in high-energy collisions of protons and nuclei. A key feature of such correlations in ultrarelativistic nucleus-nucleus (AA) collisions is the observation of a pronounced structure known as the “ridge” that has been found over a wide range of AA energies and system sizes at both th
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Presented by Dr. Javier Alberto MURILLO QUIJADA
In this talk I present a Standard Model extension with underlying A4 flavour symmetry where small Dirac neutrino masses arise from a Type-II seesaw mechanism. The model predicts the “golden” flavour-dependent bottom-tau mass relation, requires an inverted neutrino mass ordering and non-maximal atmospheric mixing angle. Using the latest neutrino oscillation global fit I derive restrictions on t
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Presented by Mr. Mario LAMPREA
The accurate calculations of cross sections involving QCD processes with large momentum transfers in proton-proton (pp) collisions provides valuable information to perform precise Standard Model measurements or to search for new physics phenomena. However it is not enough, studies on the accompanying interactions of the rest of the main hard scattering are also mandatory. Such interactions are cal
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Presented by Dr. Lizardo VALENCIA PALOMO
Hadron decay chains constitute one of the main sources of information on the QCD spectrum. We discuss the differences between several partial wave analysis formalisms used in the literature to build the amplitudes. We match the helicity amplitudes to the covariant tensor basis. Hereby, we pay attention to the analytical properties of the amplitudes and separate singularities of kinematical and dyn
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Presented by Dr. Cesar FERNANDEZ RAMIREZ
