Observation of the Semileptonic $D^{+}$ Transition into an Axial-Vector Meson ${\bar{K}}_1(1270{)}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +479

By analyzing a 2.93~$\mathrm{f}{\mathrm{b}}^{-1}$ data sample of $e^{+}{e}^{-}$ collisions, recorded at a center-of-mass energy of 3.773 $\mathrm{GeV}$ with the BESIII detector operated at the BEPCII colli…