# 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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## Place

Location: Mexico City
Date: 28 Jul 07:00 - 08:45

## Conveners

• Braaten, Eric (Ohio State University)

## Timetable | Contribution List

Displaying 5 contributions out of 5
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 $D^0\bar{D}^ ... More Presented by Prof. María GORDILLO on 28/7/2021 at 7:45 Type: Parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates Based on the constraints of the heavy quark spin symmetry, we investigate the$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)$state in the coupled channel interactions, which may be a degenerate state. Furthermore, ... More Presented by Chu-Wen XIAO on 28/7/2021 at 8:25 Type: Parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates I discuss a novel scenario for the pentaquark-like signals in the LHCb data. I identify double triangle mechanisms with kinematical singularities. I demonstrate that the double triangle amplitudes reproduce the peak structures of$P_c(4312)$,$P_c(4380)$, and$P_c(4457)$, through an interference with other common mechanisms. Only the$P_c(4440)$peak is due to a resonance with width and strength ... More Presented by Dr. Satoshi NAKAMURA on 28/7/2021 at 8:05 Type: Parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates The Belle II experiment has accumulated data corresponding to 89.99 fb-1 integrated luminosity in the past 2 years, and is performing very well. We present here the analysis of B -> K J/psi pi pi and B -> K psi(2S): in the former for the first time the evidence for the X(3872) --->Jpsi pi pi has been found at Belle II, which is consistent with the observation at Belle of the same resonant state. Presented by Elisabetta PRENCIPE on 28/7/2021 at 7:25 Type: Leading parallel Session: Exotic hadrons and candidates-3 Track: Exotic Hadrons and Candidates If the X(3872) is a weakly bound charm-meson molecule, it can be produced by the creation of$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