Observation of the radiative decay $D_s(2317{)}^{+}\to D_s^{\ast }\gamma$

Belle II Collaboration, M. Abumusabh, I. Adachi +367

We observe the radiative decay $D_{s0}^{\ast }(2317{)}^{+}\to D_s^{\ast +}\gamma$ for the first time, with a significance exceeding $10$ standard deviations. The signal is found in the contin…