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Abstract:
The long-standing puzzle of charmonium decay has been an open question for decades. The decay width quoted by PDG stands in pronounced disagreement with both experimental measurement and lattice calculation. However, this month’s latest experimental measurement supports the lattice calculation and disfavors the value quoted by the PDG. In this report, I will review our lattice studies on the charmonium decay in recent years. Besides, a precise lattice determination of the radiative decay width of the strange-charm meson is presented, which provides the most stringent constraint on the decay constant of the meson. Finally, I will introduce the state-of-the-art lattice calculation of the semileptonic decay Ds→φ, the form factors of which are by far the most precise and systematic.
Biography:
Dr. Yu Meng graduated from Zhengzhou University in 2015 and obtained his PhD from Peking University in 2020. 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.
Host: Prof. Wei Wang
Alternative online link：https://meeting.tencent.com/dm/IMNHVk2ZWI9V
ID: 314980899 password: 123456