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

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

2004-07-14

arxiv.org/abs/hep-ex/0407025v1

Phys.Rev.D71:031502,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 1 figure

Scientific paper

10.1103/PhysRevD.71.031502

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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