Observation of $D^0\to K_1(1270)^- e^+\nu_e$
M. Ablikim, М. Н. Ачасов, P. Adlarson, S. Ahmed et autres
Using 2.93 fb$^{-1}$ of $e^+e^-$ collision data taken with the BESIII detector at a center-of-mass energy of 3.773 $\rm \,GeV$, the observation of the $D^0\to K_1(1270)^- e^+\nu_e$ semileptonic decay is presented. The statistical significance of the decay $D^0\to K_1(1270)^- e^+\nu_e$ is greater …