Improved measurements of the partial rate asymmetry in B→hh decays

Y. Chao,P. Chang,K. Abe,H. Aihara,Y. Asano,T. Aushev,S. Bahinipati,A. M. Bakich,Y. Ban,I. Bedny,U. Bitenc,I. Bizjak,S. Blyth,A. Bondar,M. Braÿcko,J. Brodzicka,T. E. Browder,K.-F. Chen,B. G. Cheon,R. Chistov,S.-K. Choi,Y. Choi,S. Cole,M. Danilov,M. Dash, L. Y. Dong,S. Eidelman,V. Eiges,S. Fratina,N. Gabyshev,T. Gershon,G. Gokhroo,B. Golob,R. Guo,J. Haba,N. C. Hastings,K. Hayasaka,H. Hayashii,M. Hazumi,T. Higuchi,L. Hinz,Y. Hoshi,W.-S. Hou,S. Ogawa,T. Ohshima,T. Okabe,S. Okuno,S. L. Olsen,W. Ostrowicz,H. Ozaki,H. Palka,N. Parslow,L. E. Piilonen,M. Rozanska,H. Sagawa, Y. Sakai,N. Sato,O. Schneider,J. Schumann,A. J. Schwartz, S. Semenov,M. E. Sevior,H. Shibuya,B. Shwartz,V. Sidorov,A. Somov,N. Soni, R. Stamen,S. Stanic,M. Staric,T. Sumiyoshi,S. Suzuki,O. Tajima,F. Takasaki,K. Tamai,N. Tamura, M. Tanaka,G. N. Taylor,Y. Teramoto,K. Trabelsi,T. Tsuboyama,T. Tsukamoto, S. Uehara,T. Uglov,K. Ueno, Y. Unno,S. Uno, G. Varner,K. E. Varvell, C. C. Wang, C. H. Wang,M. Watanabe, B. D. Yabsley,Y. Yamada,A. Yamaguchi, Y. Yamashita,M. Yamauchi, J. Ying,S. L. Zang,J. Zhang,Z. P. Zhang,D. Zontar,H. Sagawa, Y. Sakai,N. Sato,O. Schneider,J. Schümann,A. Schwartz, S. Semenov,M. Sevior,H. Shibuya,B. Shwartz,V. Sidorov,A. Somov,N. Soni, R. Stamen,S. Stanič,M. Starič,K. Sumisawa,T. Sumiyoshi,S. Suzuki,O. Tajima,F. Takasaki,K. Tamai,N. Tamura, M. Tanaka,G. Taylor,Y. Teramoto,K. Trabelsi,T. Tsuboyama, T. Tsukamoto, S. Uehara,T. Uglov,K. Ueno, Y. Unno,S. Uno, G. Varner,K. Varvell, C. Wang,M. Watanabe,B. Yabsley,Y. Yamada,A. Yamaguchi, Y. Yamashita,M. Yamauchi,Heyoung Yang, J. Ying,S. Zang, J. Zhang,Z. Zhang,D. Žontar

PHYSICAL REVIEW D（2005）

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摘要

We report improved measurements of the partial rate asymmetry (A(CP)) in B-->hh decays with 140 fb(-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(+/-), K(S)(0)pi(-/+), K(-/+)pi(0), pi(-/+)pi(0), and K(S)(0)pi(0). 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 A(CP)(K(-/+)pi(+/-))-0.088+/-0.035+/-0.013, 2.4sigma from zero. Results for other decay modes are also presented.

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pi,k

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