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Belle: Updated results on $B\rightarrow K \pi/KK$ decays
Proceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005)
We report an improved measurements of direct CP violation in the decay B 0 → K + π − using 350 fb −1 of data and measurements of B meson decays to two kaons using 253 fb −1 of data. The measured CP violating asymmetries are A CP (K + π − ) = −0.113 ± 0.022(stat.) ± 0.008(syst.), where the latter correspond to the intervals −0.03 < A CP (K + π 0 ) < 0.11 and −0.12 < A CP (π + π 0 ) < 0.15 at 90% confidence level. We also find evidence for signals in B + → K 0 K + and B 0 → K 0 K 0 withdoi:10.22323/1.021.0256 fatcat:22sxr6zpyzbt3mwg34u3jw42ge