Observation of the singly Cabibbo suppressed decay $D^0\to b_1(1235)^- e^+ν_e$ and evidence for $D^+\to b_1(1235)^0 e^+ν_e$
BESIII Collaboration, M. N. Achasov, P. Adlarson, O. Afedulidis et autres
By analyzing a data sample of $e^+e^-$ collisions with center-of-mass energy $\sqrt{s}=3.773$~GeV, corresponding to an integrated luminosity of $7.9~\rm {fb}^{-1}$ collected with the BESIII detector operating at the BEPCII collider, we study semileptonic decays of the $D^{0(+)}$ mesons into the axial-vector meson …
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arXiv (Cornell University)