Observation of the decay B¯0→Ds+Λp¯

Le résumé fourni par la source

We report the first observation of the decay ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}_{s}^{+}\ensuremath{\Lambda}\overline{p}$ with a statistical significance of $6.6\ensuremath{\sigma}$. We measure $\mathcal{B}({\overline{B}}^{0}\ensuremath{\rightarrow}{D}_{s}^{+}\ensuremath{\Lambda}\overline{p})=(2.9\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}0.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in $\mathcal{B}({D}_{s}^{+}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\pi}}^{+})$. The data used for this analysis was accumulated at the $\ensuremath{\Upsilon}(4S)$ resonance, using the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. The integrated luminosity of the data sample is $414\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, corresponding to $449\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs.

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