Improved measurements of χcJ→Σ+Σ¯− and Σ0Σ¯0 decays
Mikhail N. Achasov, S. Ahmed, M. Albrecht, M. Alekseev et autres
Using a data sample of $(448.1\ifmmode\pm\else\textpm\fi{}2.9)\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector at the BEPCII collider, we present measurements of branching fractions for the decays ${\ensuremath{\chi}}_{cJ}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Sigma}}}^{+}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{\ensuremath{-}}$ and ${\mathrm{\ensuremath{\Sigma}}}^{0}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{0}$. The decays ${\ensuremath{\chi}}_{c1,2}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Sigma}}}^{+}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{\ensuremath{-}}$ and ${\mathrm{\ensuremath{\Sigma}}}^{0}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{0}$ are observed for the first time, and the …
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