Speaker
Yu Meng
(Zhengzhou University)
Description
We perform the first lattice calculation on the semileptonic decay of $J/\psi$ 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 $J/\psi\rightarrow D/D_s e\nu_e$. The ratios of the branching fractions between lepton $\mu$ and $e$ are also calculated and given by $R_{J/\psi}(D)$ and $R_{J/\psi}(D_s)$, 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)
