Test of lepton universality and measurement of the form factors of $D^0\to K^{\ast }(892{)}^{-}{\mu }^{+}{\nu }_{\mu }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +643

We report a first study of the semileptonic decay $D^0\to K^{-}{\pi }^0{\mu }^{+}{\nu }_{\mu }$ by analyzing an $e^{+}{e}^{-}$ annihilation data sample of $7.9{\mathrm{fb}}^{-1}$ collected at the cente…