Search forCPViolation inD±Meson Decays toϕπ±

M Starič,T Julius,C Kiesling,T E Browder,K S Park,G B Mohanty,J Libby,R Pestotnik,M E Sevior,Z Drásal,Y Choi,T Ohshima,C Schwanda,A Vossen,M J Kim,M Iwabuchi,K Inami,V Gaur,K Sumisawa,G Pakhlova,E Nakano,O Schneider,H Sahoo,A Ishikawa,K Trabelsi,T Iijima,T Kawasaki,E Won,B R Ko,S L Olsen,Y Teramoto,S Mconie,A M Bakich,Y Sakai,K Kinoshita,Z Doležal,N Gabyshev,C P Shen,B Golob,G Tatishvili,P Smerkol,P Križan,T Iwashita,A Chen,S Uno,T Uglov,B G Cheon,T Aushev,C Z Yuan,Z P Zhang,C C Zhang,A J Schwartz,R Chistov,S Nishida,D M Asner,H Miyata,J S Lange,T Nozaki,M Röhrken,V Bhardwaj,K Chilikin,Y Li,B Shwartz,C H Wang,S Korpar,S Uehara,A Bay,S Koblitz,T Kumita,A Zupanc,K Miyabayashi,K Hayasaka,S Okuno,M Bračko,Y Miyazaki,J H Kang,T Sanuki,L E Piilonen,M Watanabe,O Seon,S Eidelman,Z Natkaniec,R Louvot,Y Watanabe,K Arinstein,Y Yamashita,M Uchida,J Haba,B Bhuyan,M Sumihama,Y Hoshi,O Nitoh,R Itoh,H K Park ,S Stanič ,A Bożek ,A Sokolov ,B Yabsley ,S Ryu ,Y Unno ,K M Williams ,M Z Wang ,P Chen ,C Liu ,K Cho ,V Zhilich ,V Shebalin ,J Li ,N Kobayashi ,Y.-J Kwon ,G Varner ,M Iwasaki ,Soohyung Lee ,Z Q Liu ,V Zhulanov ,H J Kim ,P Urquijo ,H O Kim ,H Aihara ,K T Kim ,M Petrič ,Y J Kim ,F Simon ,Y Hsiung ,J B Kim ,Y Horii ,Kenichi Sakai ,W.-S Hou ,P Kodyš ,J E Fast ,J G Shiu ,Y S Sohn ,I S Cho ,T A Shibata

doi:10.1103/physrevlett.108.071801

Abstract

We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP violating asymmetries for the Cabibbo-suppressed decays D+ -> K+K-pi+ and the Cabibbo-favored decays Ds -> K+K-pi+ in the K+K- mass region of the phi resonance. Using 955/fb of data collected with the Belle detector we obtain A_CP(D+ -> phi pi+) = (+0.51 +- 0.28 +- 0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of five. We find no evidence for direct CP violation.

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