Measurements of CP -violating asymmetries and branching fractions in B decays to ωK and ωπ

Le résumé fourni par la source

We present measurements of $CP$-violating asymmetries and branching fractions for the decays ${B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+}$, ${B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{K}^{+}$, and ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\omega}{K}^{0}$. The data sample corresponds to $232\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs produced by ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at the $\ensuremath{\Upsilon}(4S)$ resonance. For the decay ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\omega}{K}_{S}^{0}$, we measure the time-dependent $CP$-violation parameters $\mathrm{S}={0.51}_{\ensuremath{-}0.39}^{+0.35}\ifmmode\pm\else\textpm\fi{}0.02$, and $\mathrm{C}=\ensuremath{-}{0.55}_{\ensuremath{-}0.26}^{+0.28}\ifmmode\pm\else\textpm\fi{}0.03$. We also measure the branching fractions, in units of ${10}^{\ensuremath{-}6}$, $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+})=6.1\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}0.4$, $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{K}^{+})=6.1\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.4$, and $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}\ensuremath{\omega}{K}^{0})=6.2\ifmmode\pm\else\textpm\fi{}1.0\ifmmode\pm\else\textpm\fi{}0.4$, and charge asymmetries ${\mathcal{A}}_{\mathrm{ch}}({B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+})=\ensuremath{-}0.01\ifmmode\pm\else\textpm\fi{}0.10\ifmmode\pm\else\textpm\fi{}0.01$ and ${\mathcal{A}}_{\mathrm{ch}}({B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{K}^{+})=0.05\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.01$.

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