Observation Of Time-Dependent Cp Violation In B-0 ->Eta K-'(0) Decays And Improved Measurements Of Cp Asymmetries In B-0 ->Phi K-0, (Ksksks0)-K-0-K-0 And B-0 -> J/Psi K-0 Decays

The Belle Collaboration: K. -F. Chen,K F Chen,Yuan Chao,D Liventsev,R Kulasiri,H Kichimi,R Pestotnik,Hitoshi Shibuya,Stewart T Cole,S Uehara,S L Olsen,K Hayasaka,K Sumisawa,H Kakuno,E Won,Miho Tanaka,R Seidl,A Bozek,U Bitenc,Hyangkyu Park,Tetsuya Sumiyoshi,J Brodzicka,S W Lin,F Takasaki,B G Cheon,S Hou,H Ishino,T Tsuboyama,B Golob,K Arinstein,T Iijima,A Ishikawa, Masaki Iwasaki,S Fratina,P Urquijo,Naohisa Katayama,A Matyja,Shigeyuki Suzuki,Yoshiaki Watanabe,K Inami,A Somov,Jiarong Li,V Zhilich,M J Lee,K Hara,Y Miyazaki,H Hayashii,Jason Lee,A Limosani,S Okuno,Y Sakai,J Haba,S Korpar,S Banerjee,D Mohapatra,S Ogawa,G Majumder,H Stoeck,R Mizuk,Toshiro Higuchi,L E Piilonen,K Ueno,P Krizan,O Schneider,T Tsukamoto,M Bracko,W T Chen,Y J Kwon,I Adachi,G N Taylor,Kenichi Abe,M E Sevior,K Senyo,M Shapkin,G Leder,Y Unno,Masashi Hazumi,S Blyth,Paoti Chang,Y Hoshi,G R Moloney,K Kinoshita,X C Tian,O Tajima,K Belous,E Barberio,H R Khan,A Imoto,W S Hou,A Kusaka,J B Singh,S Eidelman,G Gokhroo,M Dash,H Aihara,A Go,M Nakao,T Nozaki,H Aihara,P Goldenzweig,So Noguchi,Y Nagasaka,M Staric,H Palka,Airong Chen,Tomihisa Kawasaki,Silvia Maria Alfaye Villa,T E Browder,Y Ushiroda,J Dalseno,A Drutskoy,P Krokovny,A J Schwartz,Y K Choi,P Pakhlov,Y Nakahama,W Mitaroff,J Schumann,D Heffernan,T Nagamine,Takashi Matsumoto,Ichiro Nakamura,G Varner,Y Teramoto,C H Wang,J Dragic,A Bondar,N Satoyama,K Trabelsi,K Miyabayashi,Y Yusa,R Itoh,S Stanic,S K Choi,Yuzo Iwasaki,M Danilov,A Sokolov,Hisashi Kawai,J H Kang,T Schietinger,A Kuzmin,K E Varvell,A Zupanc,I Bizjak,Y B Hsiung,Yanwen Liu,Raj Kumar,Marlon Barbero,E Nakano,G Pakhlova,T Lesiak,S Nishida,A Chuvikov,B Shwartz,Atsushi Yamaguchi,T Hara,Alice Eiko Murakami,S K Kim,Makoto Yamauchi,T Ohshima,H Ozaki,C C Kuo,Y Yamashita,Yoshichika Onuki,T Gershon,Y Usov,Tomoyuki Higuchi,D Anipko, Aulchenko,T Aushev,T Aziz,A M Bakich,Balagura,A Bay,R Chistov,Stephen Cole,D Epifanov,A Garmash,H Hayashii,T Hokuue,K Ikado,S U Kataoka, Hyun Jung Kim,Y J Kim,Rahi Kumar,Junjie Li,F Mandl,H Miyake,H Miyata,Ayumi Murakami,Z Natkaniec,O Nitoh,W Ostrowicz,H Sahoo,Shota Suzuki,K Tamai, Nao Tamura,T Uglov,S Uno,M Z Wang,Yuki Watanabe,R Wedd,Q L Xie,B D Yabsley,Akio Yamaguchi,C C Zhang,Z P Zhang

PHYSICAL REVIEW LETTERS（2007）

Cited 179|Views22

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Abstract

We present improved measurements of CP-violation parameters in B-0 -> phi K-0, eta K-'(0), (KSKSKS0)-K-0-K-0 decays based on a sample of 535 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2 phi(eff)(1) = +0.64 +/- 0.10(stat) +/- 0.04(syst) for B-0 -> eta K-'(0), +0.50 +/- 0.21(stat) +/- 0.06(syst) for B-0 ->phi K-0, and +0.30 +/- 0.32(stat) +/- 0.08(syst) for B-0 -> (KSKSKS0)-K-0-K-0 decays. We have observed CP violation in the B-0 -> eta K-'(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B-0 -> J/psi K-0 decays and obtain sin2 phi(1) = +0.642 +/- 0.031(stat) +/- 0.017(syst).

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physics

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