Improved Measurements of Partial Rate Asymmetry in B -> h h Decays

et al. (for the Belle Collaboration); P. Chang; Y. Chao

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Improved Measurements of Partial Rate Asymmetry in B -> h h Decays

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arxiv hep-ex/0407025 v1 pith:23J6N5B3 submitted 2004-07-14 hep-ex

Y. Chao , P. Chang , et al. (for the Belle Collaboration) This is my paper · ORCID

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We report improved measurements of the partial rate asymmetry (Acp) in B -> h h decays with 140fb^-1 of data collected with the Belle detector at the KEKB e+e- collider. Here h stands for a charged or neutral pion or kaon and in total five decay modes are included: K-+ pi+-, K0s pi-+, K-+ pi0, pi-+ pi0 and K0s pi0. The flavor of the last decay mode is determined from the accompanying B meson. Using a data sample 4.7 times larger than that of our previous measurement, we find Acp(K-+ pi+-) -0.088+-0.035+-0.013, 2.4 sigma from zero. Results for other decay modes are also presented.

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