Measurement of CP Violation in the Phase Space of B±→K+K−π± and B±→π+π−π± Decays

Le résumé fourni par la source

The charmless decays ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ are reconstructed in a data set of $pp$ collisions with an integrated luminosity of $1.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ and center-of-mass energy of 7 TeV, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured to be ${A}_{CP}({B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}})=\ensuremath{-}0.141\ifmmode\pm\else\textpm\fi{}0.040\text{ }\text{ }(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.018\text{ }(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.007(J/\ensuremath{\psi}{\text{ }K}^{\ifmmode\pm\else\textpm\fi{}})$ and ${A}_{CP}({B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}})=0.117\ifmmode\pm\else\textpm\fi{}0.021\text{ }(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}\phantom{\rule{0ex}{0ex}}0.009\text{ }(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.007(J/\ensuremath{\psi}\text{ }{K}^{\ifmmode\pm\else\textpm\fi{}})$, where the third uncertainty is due to the $CP$ asymmetry of the ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}J/{\ensuremath{\psi}K}^{\ifmmode\pm\else\textpm\fi{}}$ reference mode. In addition to the inclusive $CP$ asymmetries, larger asymmetries are observed in localized regions of phase space.

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