Search for the charmonium weak decay $\ddot{I}ˆ(2S)\to D_s^{-}\ddot{I}{€}^{+}+c.c.$ and $\ddot{I}ˆ(2S)\to D_s^{-}\ddot{I}{}^{+}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +720

We search for the weak decays $\ddot{I}ˆ(2S)\to D_s^{-}\ddot{I}{€}^{+}+c.c.$ and $\ddot{I}ˆ(2S)\to D_s^{-}\ddot{I}{}^{+}+c.c.$ for the first time. The search is based on $(2712.4\pm 14.3)\times 10^6$ events containin…