Observation of the decay B 0 → η ′ K * ( 892 ) 0

T Kumita,Y J Kwon,Jing Li,Yiping Li,J Libby,D Liventsev,U Tamponi,M Sumihama,J Stypula, M Steder,M Staric,E Solovieva,V Zhilich,Z P Zhang, Y Yook, S Yashchenko,E Won,K M Williams,S Wehle,A Sokolov, Y S Sohn, Francisco Marco Simon,A Sibidanov,B Shwartz,J G Shiu,T A Shibata,C P Shen,V Shebalin,M E Sevior,O Seon,K Senyo,D Semmler,A J Schwartz, C Schwanda,G Schnell, Y Watanabe,Masami Watanabe,X L Wang,Shusei Sato,Y Yusa,G B Mohanty,A Abdesselam,I Adachi,H Aihara,S Al Said, D M Asner,T Aushev, R Ayad, S Bahinipati,A M Bakich,Vikas Bansal,V Bhardwaj,B Bhuyan,G Bonvicini, A Bozek,M Bracko,T E Browder,D Cervenkov,Philip Chang,V Chekelian,A Chen,O Schneider, V Savinov,Yutaka Sato,Pan Wang,M Z Wang,C H Wang, M N Wagner,V Vorobyev, G Varner,P Vanhoefer,C Van Hulse,S Uno, Y Unno,T Uglov,S Uehara,T Sanuki,L Santelj,S Sandilya, Y Sakai,V Zhulanov,A Rostomyan,M Ritter,L E Piilonen, M Petric,T K Pedlar,B G Cheon,K Chilikin,K Cho,V Chobanova,Y Choi, A Zupanc,Hyoeun Park,D Cinabro,J Dalseno,G Pakhlova,P Pakhlov,S Okuno,M Danilov,Z Doležal,Z Drasal,A Drutskoy, S Eidelman,H Farhat, J Fast,T Ferber,O Frost,V Gaur, Sanmay Ganguly,A Garmash,R Gillard, R Glattauer,Y M Goh,B Golob,O Grzymkowska,K Hayasaka, H Hayashii,X H He,Toshihiro Higuchi, W S Hou,M Uchida,K Trabelsi, F Thorne,Y Teramoto,G Tatishvili,Satoshi Ogawa,S Nishida,N K Nisar,E Nedelkovska,Z Natkaniec, T Nanut, M Nakao,E Nakano,A Moll,R Mizuk,H Miyata,K Miyabayashi,D Matvienko,M Huschle, Toshihiko Iijima,K Inami,A Ishikawa,R Itoh, Y Iwasaki,I Jaegle, K K Joo,T Julius,E Kato,Tsutomu Kawasaki,Dong Yeon Kim,Jae Bum Kim,K T Kim, M J Kim,Yu Jin Kim,K Kinoshita,J Klucar,B R Ko,P Kodys,S Korpar,P Križan,P Krokovny,T Kuhr

Physical Review D（2014）

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摘要

We report a search for charmless hadronic decays of neutral B mesons to eta ' K* (892)(0). The results are based on a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar pairs, collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We observe the decay for the first time with a significance of 5.0 standard deviations and obtain its branching fraction B[B-0 -> eta ' K* (892)(0)] = [2.6 +/- 0.7(stat) +/- 0.2(syst)] x 10(-6). We also measure the CP-violating asymmetry as A(CP) [B-0 -> eta ' K* (892)(0)] = -0.22 +/- 0.29(stat) +/- 0.07(syst).

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