Precision Measurement of the Decay ${\Sigma }^{+}\to p\gamma$ in the Process $J/\psi \to {\Sigma }^{+}{\bar{\Sigma }}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +593

Using $(10087\pm 44)\times 10^6$ $J/\psi$ events collected with the BESIII detector, the radiative hyperon decay $\Sigma \to p\gamma$ is studied at an electron-positron collider experi…