Search for $\Delta S=2$ nonleptonic hyperon decays ${\Omega }^{-}\to {\Sigma }^0{\pi }^{-}$ and ${\Omega }^{-}\to n{K}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +644

Using $(27.12\pm 0.14)\times 10^8$ $\psi (3686)$ events collected by the BESIII detector at the center-of-mass energy of $\sqrt{s}=3.686$ GeV, we search for the first time for tw…