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In contrast to conventional particles composed of two or three quarks, exotic particles made up of more quarks offer deeper insights into the nature of the strong interaction and expand our knowledge of the fundamental structure of matter. In recent years, the LHCb, ATLAS, and CMS experiments have successively discovered a series of exotic structures in the di-charmonium invariant mass spectrum, the properties of which are highly similar to the all-charm tetraquark states predicted by theory half a century ago. Since these exotic particles are bound together by non-perturbative strong interactions, understanding their fundamental properties requires the use of non-perturbative theoretical methods. Lattice QCD has proven to be highly effective in addressing various non-perturbative issues in strong interactions. In this presentation, I will review recent lattice studies on the di-charmonium system and discuss the possible types of interactions involved.
Biography: Dr. Meng Yu graduated from Zhengzhou University in 2015 and obtained his Ph.D from Peking University in 2020, under the supervision of Professor Liu Chuan. He subsequently conducted postdoctoral research at the Center for High Energy Physics at Peking University. In 2022, he joined Zhengzhou University as a Research Fellow. His research primarily focuses on utilizing lattice QCD to study the radiative and weak decays of charmed hadrons, as well as hadron-hadron scattering processes.
Tencent Meeting: 536-741-153
Yao Ma