Observation of $D^{+}\to f_0(500)\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and study of $D^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ decay dynamics

BESIII Collaboration, M. Ablikim, M. N. Achasov +619

Using $2.93{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected with the BESIII detector at the center-of-mass energy of 3.773 GeV,we investigate the semileptonic decays $D^+\to…