Measurement of the branching fraction for the decay ψ(3686)→ϕKS0KS0

Le résumé fourni par la source

Based on $(448.1\ifmmode\pm\else\textpm\fi{}2.9)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\phi}{K}_{S}^{0}{K}_{S}^{0}$ is observed for the first time. Taking the interference between $\ensuremath{\psi}(3686)$ decay and continuum production into account, the branching fraction of this decay is measured to be $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\phi}{K}_{S}^{0}{K}_{S}^{0})=(3.53\ifmmode\pm\else\textpm\fi{}0.20\ifmmode\pm\else\textpm\fi{}0.21)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, where the first uncertainty is statistical and the second is systematic. Combining with the world average value for $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\phi}{K}_{S}^{0}{K}_{S}^{0})$, the ratio $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\phi}{K}_{S}^{0}{K}_{S}^{0})/\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\phi}{K}_{S}^{0}{K}_{S}^{0})$ is determined to be $(6.0\ifmmode\pm\else\textpm\fi{}1.6)%$, which is suppressed relative to the 12% rule.

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