Improved Measurements of Direct CP Violation in B --> K+pi-, K+pi0 and pi+pi0 Decays

Details Improved Measurements of Direct CP Violation in B --> K+pi-, K+pi0 and pi+pi0 Decays Improved Measurements of Direct CP Violation in B --> K+pi-, K+pi0 and pi+pi0 Decays

2005-07-11

arxiv.org/abs/hep-ex/0507045v1

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 3 figures, submitted to the Lepton-Photon 2005 Conference in Uppsala, Sweden and HEP2005 Europhysics Conference in L

Scientific paper

We report an improved measurement of direct CP violation in the decay B0 --> K+pi-, and a search for CP violation in the decays B+ --> K+pi0 and B+ --> pi+pi0. The measured CP violating asymmetries are Acp(K+pi-)=-0.113+-0.022(stat.)+-0.008(syst.), Acp(K+pi0)=0.04+-0.04(stat.)+-0.02(syst.) and Acp(pi+pi0)=0.02+-0.08(stat.)+-0.01(syst.), where the latter correspond to the intervals -0.03

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