Observation of Time-DependentCPViolation inB0→η′K0Decays and Improved Measurements ofCPAsymmetries inB0→φK0,KS0KS0KS0andB0→J/ψK0Decays

K F Chen ,T Lesiak,K Ikado,R Pestotnik,T Hara,T E Browder,D Liventsev,I Nakamura,P Goldenzweig,F Mandl,T Nagamine,U Bitenc,P Chang,M Danilov,G N Taylor,Z P Zhang,G R Moloney,H Hayashii,S Okuno,P Križan,A Go,B G Cheon,H Shibuya,M Bračko,K Miyabayashi,I Adachi,T Ohshima,H Kawai,B Golob,H Miyata,K Ueno,H Ha,S Korpar,A Imoto,I Bizjak,S Villa,K Inami,M J Lee,F Takasaki,L E Piilonen,Y Watanabe,S Ogawa,T Kawasaki,A Yamaguchi,O Schneider,N Satoyama,X C Tian,K Belous,M E Sevior,J Haba,Y Ushiroda,S Noguchi,T Sumiyoshi,Y Yusa,C H Wang,Z Natkaniec,K Sumisawa,A Matyja,A Chuvikov,S Uehara,S U Kataoka,K Arinstein,A Bay,K Kinoshita,T Iijima,A Chen,S Banerjee,H Park,Y Choi,A Drutskoy,T Aushev,H Kakuno,Y Onuki,S Nishida,N Katayama,M Nakao,K Hayasaka,S Eidelman,B Shwartz,S Cole,M Starič,K Trabelsi,G Pakhlova,T Higuchi,S Uno,A Garmash,A M Bakich,Y Teramoto,R Itoh,Y Yamashita,M Dash,C C Zhang,P Pakhlov,J Schümann,T Matsumoto,O Nitoh,A Ishikawa,J H Kang,H Ozaki,W Ostrowicz,R Mizuk,T Tsuboyama,Y Usov,M Iwasaki,H R Khan,T Uglov,E Won,R Kulasiri,D Epifanov,T Nozaki,T Tsukamoto,D Anipko,E Nakano,A Zupanc,G Leder,H Miyake,K Senyo,Y Miyazaki,R Seidl,K Tamai,H Kichimi,A Kuzmin,Y Sakai,A Somov,M Yamauchi,J Dragic,S Fratina,H Sahoo,T Schietinger,P Krokovny,H Stoeck,M Shapkin,Y Hoshi,D Heffernan,S L Olsen,J Dalseno,T Hokuue,D Mohapatra,G Gokhroo,R Chistov,Y Nagasaka,R Wedd,V Zhilich,J B Singh,A Kusaka,S K Choi ,S Blyth,Y Nakahama,O Tajima,N Tamura,J Li,M Z Wang ,A Bożek ,V Balagura,B Yabsley ,H Ishino,H Pałka ,J Lee,S Suzuki,T Aziz,T Gershon,M Tanaka,E L Barberio ,Y Chào ,W.-S Hou,M Barbero,K E Varvell,C C Wang,G Majumder,C C Kuo,Rajeev Kumar ,W T Chen,Y Unno,Qingguo Xie ,S Hou,H J Kim,G Varner,M Hazumi,A J Schwartz,Y Liu,S Stanič,P Urquijo,A Limosani,K Hara,A Sokolov,V Aulchenko,S K Kim,J Brodzicka,Y.-J Kwon,Y Hsiung ,W Mitaroff,H Aihara,A Bondar,Kazuo Abe ,Akira Murakami ,Y J Kim,S W Lin

doi:10.1103/physrevlett.98.031802

Observation of Time-DependentCPViolation inB0→η′K0Decays and Improved Measurements ofCPAsymmetries inB0→φK0,KS0KS0KS0andB0→J/ψK0Decays

K F Chen , T Lesiak + Show 195 more

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https://doi.org/10.1103/physrevlett.98.031802

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Journal: Physical Review Letters	Publication Date: Jan 16, 2007
Citations: 105

Affiliation: Polish Academy of Sciences, Nagoya University, Osaka University, University of Cincinnati, Austrian Academy of Sciences, Tohoku University, National Taiwan University, University of Melbourne, University of Science and Technology of China, Nara Women's University, Kanagawa University, University of Ljubljana, National Central University, Chonnam National University, Toho University, University of Maribor, Chiba University, Niigata University, Korea University, École Polytechnique Fédérale de Lausanne, Seoul National University, Virginia Tech, Tokyo Institute of Technology, Shinshu University, Peking University, Tokyo Metropolitan University, Princeton University, Budker Institute of Nuclear Physics, Tata Institute of Fundamental Research, Kyungpook National University, Sungkyunkwan University, The University of Tokyo, University of Sydney, Osaka City University, National United University, Tokyo University of Agriculture and Technology, Yonsei University, University of Illinois Urbana-Champaign, Tohoku Gakuin University

#CP-violation Parameters In B0 #CP Asymmetries In B0 + Show 8 more

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Abstract

We present improved measurements of CP-violation parameters in B0→ϕK0, η′K0, KS0KS0KS0 decays based on a sample of 535×106 BB¯ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e− collider. We obtain sin2ϕ1eff=+0.64±0.10(stat)±0.04(syst) for B0→η′K0, +0.50±0.21(stat)±0.06(syst) for B0→ϕK0, and +0.30±0.32(stat)±0.08(syst) for B0→KS0KS0KS0 decays. We have observed CP violation in the B0→η′K0 decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B0→J/ψK0 decays and obtain sin2ϕ1=+0.642±0.031(stat)±0.017(syst).Received 2 October 2006DOI:https://doi.org/10.1103/PhysRevLett.98.031802©2007 American Physical Society

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