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28 July 2024 to 3 August 2024
Europe/London timezone

Lattice QCD calculation of the semileptonic decay J/ψD/Dslνl

30 Jul 2024, 13:45
20m
Talk Quark and Lepton Flavour Physics Quark and lepton flavour physics

Speaker

Yu Meng (Zhengzhou University)

Description

We perform the first lattice calculation on the semileptonic decay of J/ψ using the (2+1)-flavor Wilson-clover gauge ensembles generated by CLQCD collaboration. After a continuum extrapolation using three lattice spacings, we obtain the final branching fraction of J/ψD/Dseνe. The ratios of the branching fractions between lepton μ and e are also calculated and given by RJ/ψ(D) and RJ/ψ(Ds), which provide necessary theoretical supports for the experimental test of lepton flavour universality in the future.

Author

Yu Meng (Zhengzhou University)

Co-authors

Chuan Liu (Peking University) Haobo Yan (Peking University) Jin-Long Dang (Peking University) Xin-Yu Tuo (Brookhaven National Laboratory) Yi-Bo Yang (University of Chinese Academy of Sciences) Ke-Long Zhang (Computer Network Information Center, Chinese Academy of Sciences)

Presentation materials