Measurement ofCPAsymmetry in a Time-Dependent Dalitz Analysis ofB0→(ρπ)0and a Constraint on the Quark Mixing Matrix Angleϕ2

A Kusaka,A Ishikawa,H Ozaki,K Kinoshita,A Kuzmin,H Stoeck,A Yamaguchi,P Pakhlov,Y Ushiroda,S Nishida,S Villa,J Dalseno,N Gabyshev,T Hara,S Cole,X C Tian,J Haba,K Tamai,S Korpar,H Kakuno,H Park,M E Sevior,I Bizjak,R Pestotnik,T Kawasaki,H Nakazawa,D Liventsev,T Iijima,P Chang,T Aushev,E Won,B Golob,T Tsuboyama,I Tikhomirov,K Miyabayashi,Z Natkaniec,A Bay,H Hayashii,N C Hastings,U Bitenc,A J Schwartz,R Itoh,A M Bakich,J Dragic,H Kichimi,A Imoto,L E Piilonen,H R Khan,I Adachi,M Danilov,M Iwasaki,H Ha,F Mandl,K Belous,S Ogawa,N Soni,Y Onuki,M Nakao,Y Yamashita,N Satoyama,K Inami,A Zupanc,Y Usov,L S Peak,J H Kang,S Uno,T Matsumoto,S Fratina,S Noguchi,M Shapkin,T E Browder,Y Choi,F Takasaki,J Schümann,T Lesiak,R Chistov,S Eidelman,K Trabelsi,R Mizuk,Y Sakai,G N Taylor,K Hayasaka,S Uehara,A Drutskoy,A Somov,R Kulasiri,S Okuno,Z P Zhang,A Garmash,Y Teramoto,K Ikado,O Schneider,I Bedny,Y Watanabe,O Nitoh,D Heffernan,P Kapusta,H Kawai,G Gokhroo,H Miyake,P Krokovny,Y Miyazaki,C H Wang,T Uglov,N Katayama,K Senyo,M Bračko,G Pakhlova,A Chen,T Tsukamoto,H Shibuya,M Dash,D Anipko,E Nakano,T Hokuue,P Križan,M Starič,Y Hoshi,R Seidl,T Ohshima,K S Park,M J Lee,B G Cheon,T Gershon,L M Zhang,M Hazumi,V Zhilich,G Varner,O Tajima,A Limosani,M Fujikawa,S Blyth,J Lee,Qingguo Xie ,Hiroshi Kaji ,A Bożek ,Rajeev Kumar ,B Yabsley ,M Z Wang ,S K Choi ,E L Barberio ,Kazuo Abe ,Y Chào ,S W Lin ,M C Chang ,S Suzuki ,Y Hsiung ,K F Chen ,Takashi Mori ,A Poluektov,A Bondar,W T Chen,M Tanaka,V Aulchenko,W.-S Hou,J B Singh,C C Kuo,H Aihara,R Wedd,Y Unno,S E Lee,D Marlow,Y.-J Kwon,P Urquijo,Y J Kim,S Stanič,H Ishino,S Hou,C C Wang

doi:10.1103/physrevlett.98.221602

Abstract

We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0-->pi+pi-pi0 decays based on a 414 fb(-1) data sample containing 449 x 10(6) BB pairs. The data was collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle phi2, 68 degrees < phi2 < 95 degrees as the 68.3% confidence interval for the phi2 solution consistent with the standard model (SM). A large SM-disfavored region also remains.

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