Measurement Of Branching Fractions And Cp Violation Parameters In B -> Omega K Decays With First Evidence Of Cp Violation In B-0 -> Omega K-S(0)

V Chobanova,J Dalseno,C Kiesling,I Adachi, H Aihara,D M Asner,V Aulchenko,T Aushev,T Aziz,A M Bakich,A Bala, Y Ban,K Belous,B Bhuyan,A Bobrov,G Bonvicini,A Bozek, M Bracko,T E Browder, D Cervenkov,V Chekelian,Amy Chen,B G Cheon,K Chilikin,R Chistov,K Cho,Y Choi,D Cinabro,M Danilov,Z Dolezal, Z Drasal,D Dutta,K Dutta,S Eidelman,S Esen,H Farhat, J Fast, T Ferber,V Gaur,N Gabyshev,S Ganguly,A Garmash,R Gillard,Y M Goh,B Golob,J Haba,Kazuhiro Hayasaka,X H He,Y Horii,Y Hoshi,W S Hou,Y B Hsiung,H J Hyun,T Iijima,K Inami,A Ishikawa, Y Iwasaki,Takashi Iwashita,I Jaegle,T Julius,J H Kang,E Kato,H Kawai,T Kawasaki,Do Young Kim,Hyung Ju Kim,Jae Bum Kim,M J Kim,Young Jo Kim,K Kinoshita,J Klucar,B R Ko, P Kodys,S Korpar,P Krokovny,B Kronenbitter,T Kuhr,T Kumita,A Kuzmin, J S Lange,Seung Hyun Lee,Jianming Li,Yonghui Li,L Li Gioi,J Libby,D Liventsev,P Lukin, D Matvienko,K Miyabayashi,H Miyake,H Miyata,R Mizuk, G B Mohanty,A Moll,N Muramatsu, R Mussa,E Nakano, M Nakao,Z Natkaniec,M Nayak,E Nedelkovska,C Ng,N K Nisar,S Nishida,O Nitoh,S Ogawa,S Okuno,P Pakhlov,G Pakhlova,C W Park,H K Park, T K Pedlar, Tsunghung Peng, R Pestotnik, M Petric, L E Piilonen,M Ritter, M Roehrken, A Rostomyan,H Sahoo, Takumi Saito, Yusaku Sakai, L Santelj,T Sanuki, V Savinov,O Schneider,A J Schwartz,D Semmler,K Senyo,O Seon, M E Sevior,M Shapkin, T A Shibata,J G Shiu,B Shwartz,A Sibidanov, Francisco Marco Simon,Y S Sohn, S Stanic, M Staric, M Steder,K Sumisawa,T Sumiyoshi,U Tamponi,G Tatishvili,Y Teramoto, K Trabelsi,Makoto Uchida,T Uglov, Y Unno,S Uno,C Van Hulse,P Vanhoefer, G Varner, K E Varvell, A Vinokurova,V Vorobyev,M N Wagner,C H Wang,M Z Wang,Pei Wang, Mitsuhiro Watanabe, Y Watanabe,K M Williams,E Won,H Yamamoto,Yoichi Yamashita, S Yashchenko, Z P Zhang,V Zhilich,V Zhulanov, A Zupanc

PHYSICAL REVIEW D（2014）

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摘要

We present a measurement of the branching fractions and charge- parity-( CP-) violating parameters in B..K decays. The results are obtained from the final data sample containing 772 x 10(6) BB _ pairs collected at the.d4S_ resonance with the Belle detector at the KEKB asymmetric- energy e_e- collider. We obtain the branching fractions BdB0 0 _d4.5 0.4dstat_ 0.3dsyst_x10- 6; BdB_..K__ d6.80.4dstat_ 0.4dsyst__x10- 6 which are in agreement with their respective current world averages. For the CP- violating parameters, we obtain A.K0 S - 0.36 +/- 0.19dstat_ 0.05dsyst_; S.K0 S _0.91 0.32dstat_ 0.05dsyst_; A.K_ - 0.03 +/- 0.04dstat_ 0.01dsyst_; where A and S represent the direct and mixing- induced CP asymmetry, respectively. We find no evidence of CP violation in the decay channel B_..K_; however, we obtain the first evidence of CP violation in the B0..K0 S decay channel at the level of 3.1 standard deviations.

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cp violation

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