Model independent determination of the spin of the ${\Omega }^{-}$ and its polarization alignment in $\psi (3686)\to {\Omega }^{-}{\bar{\Omega }}^{+}$

M. Ablikim, M. N. Achasov, P. Adlarson +484

We present an analysis of the process $\psi (3686)\to {\Omega }^{-}{\bar{\Omega }}^{+}$ (${\Omega }^{-}\to K^{-}\Lambda$, ${\bar{\Omega }}^{+}\to K^{+}\bar{\Lambda }$, $\Lambda \to p{\pi }^{-}$, $\bar{\Lambda }\to \bar{p}{\pi }^{+}$) based on a data set of $448\times 10^6$ $…