Studies of CP Violation in B→J/ψK* Decays

Le résumé fourni par la source

$CP$ violation in $B\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{*}$ decays is studied using an angular analysis in a data sample of $253\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded with the Belle detector at the KEKB ${e}^{+}{e}^{\ensuremath{-}}$ collider. The flavor separated measurements of the decay amplitudes indicate no evidence for direct $CP$ violation. $T$-odd $CP$ violation is studied using the asymmetries in triple product correlations, and the results are consistent with the standard model null predictions. The time-dependent angular analysis gives the following values of $CP$-violating parameters: $\mathrm{sin}2{\ensuremath{\phi}}_{1}=0.24\ifmmode\pm\else\textpm\fi{}0.31\ifmmode\pm\else\textpm\fi{}0.05$ and $\mathrm{cos}2{\ensuremath{\phi}}_{1}=0.56\ifmmode\pm\else\textpm\fi{}0.79\ifmmode\pm\else\textpm\fi{}0.11$.

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