Observation of the decay ψ(3686)→ΛΣ¯±π∓+c.c.

Le résumé fourni par la source

Using a sample of $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $\ensuremath{\psi}(3686)$ events collected with the BESIII detector, we present the first observation of the decays of $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{c}.\mathrm{c}.$ and $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}+\mathrm{c}.\mathrm{c}.$ The branching fractions are measured to be $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{c}.\mathrm{c}.)=(1.40\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}+\mathrm{c}.\mathrm{c}.)=(1.54\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, where the first errors are statistical and the second ones systematic.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.