Measurements of branching fraction and direct CP asymmetry in B±→KS0KS0K± and a search for B±→KS0KS0π±

Le résumé fourni par la source

We study charmless hadronic decays of charged $B$ mesons to the final states ${K}_{S}^{0}{K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}$ and ${K}_{S}^{0}{K}_{S}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ using a $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample that contains $772\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs and was collected at the $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. For ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}$, the measured branching fraction and direct $CP$ asymmetry are $[10.42\ifmmode\pm\else\textpm\fi{}0.43(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.22(\mathrm{syst})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ and $[+1.6\ifmmode\pm\else\textpm\fi{}3.9(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.9(\mathrm{syst})]%$, respectively. In the absence of a statistically significant signal for ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, we obtain a 90% confidence-level upper limit on its branching fraction as $8.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$.

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