Measurement of the $D_s^{+}\to {\ell }^{+}{\nu }_{\ell }$ branching fractions and the decay constant $f_{D_s^{+}}$

M. Ablikim, M. N. Achasov, X. C. Ai +412

Using 482~pb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of $\sqrt{s}=4.009$ GeV with the BESIII detector, we measure the branching fractions of the de…