Improved measurement of the branching fraction of $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +608

Using $e^{+}{e}^{-}$ collision data with an integrated luminosity of $7.33{\mathrm{fb}}^{-1}$ collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector ope…