Precision Measurement of the Branching Fraction of $D^{+}\to {\mu }^{+}{\nu }_{\mu }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using $20.3{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of $E_{c.m.}=3.773$ GeV with the BESIII detector operating at the BEPCII collider,…