Lattice 2024

Lattice QCD calculation of the semileptonic decay J/ψ→D/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 $J/\psi$ 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 $J/\psi \to D/D_{s}e{\nu }_e$. 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.

Presentation materials

Lattice2024_YuMeng.pdf