Study of ${\Lambda }_c^{+}\to \Lambda {\mu }^{+}{\nu }_{\mu }$ and Test of Lepton Flavor Universality with ${\Lambda }_c^{+}\to \Lambda {\ell }^{+}{\nu }_{\ell }$ Decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +614

The measurement of the Cabibbo-favored semileptonic decay ${\Lambda }_c^{+}\to \Lambda {\mu }^{+}{\nu }_{\mu }$ is reported using $4.5{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at center-of-m…