Measurements of time-dependent CP violation in B0 → (2S)K0 S decays

Himansu Sahoo,Thomas E. Browder,Karim Trabelsi,I. Adachi,Hiroaki Aihara,K. Arinstein,Tagir A Kh Aushev,S. Bahinipati,A. M. Bakich,Vladislav Balagura,E. L. Barberio, A. Bay,I. V. Bedny,K. S. Belous,Urban Bitenc,Alex E. Bondar,Andrzej Bozek,M. Bračko,M. C. Chang,Yuan Chào,A. Chen,W. T. Chen,Byunggu Cheon,R. Chistov,I. S. Cho,Y. K. Choi,J. P. Dalseno,M. Dash,A. Drutskoy,Simon I. Eidelman,B. Golob,H. Ha,Junji Haba,K. Hara, T. Hara,K. Hayasaka,Hisaki Hayashii,Masashi Hazumi,Daniel M. Heffernan,Y. Hoshi,Weishu Hou,Y. B. Hsiung,Hyojung Hyun,K. Inami,Akimasa Ishikawa,Hirokazu Ishino,R. Itoh,Masahiko Iwasaki,Neha J. Joshi,Dongha Kah,Juhwan Kang,Piotr J. Kapusta,N. Katayama,Hiromichi Kichimi,Hongju Kim,Youngjin Kim,K. Kinoshita,Samo Korpar,Y. Kozakai,Peter Križan,Pavel P. Krokovny,R. Kumar, Chiencheng Kuo,Y. Kuroki,Youngjoon Kwon,J. S. Lee,Moonjoo Lee,S. E. Lee,Tadeusz Lesiak, J. Li, A. Limosani,D. Liventsev,Franz Mandl,Adam Tomasz Matyja,S. McOnie, T. Medvedeva,Winfried A. Mitaroff,Kenkichi Miyabayashi,H. Miyake,H. Miyata,Y. Miyazaki,Roman V. Mizuk,G. R. Moloney,E. Nakano, M. Nakao,Z. Natkaniec,S. Nishida,O. Nitoh,S. Noguchi,S. Ogawa,T. Ohshima,S. Okuno,Stephen Lars Olsen,P. N. Pakhlov,G. Pakhlova,H. Palka,C. W. Park,H. K. Park,L. S. Peak,Rok Pestotnik,Leo E. Piilonen, Y. Sakai,Olivier Schneider,C. Schwanda,A. J. Schwartz,K. Senyo,Martin E. Sevior,M. M. Shapkin,Chengping Shen,H. Shibuya,Jingge Shiu, B. A. Shwartz,A. M. Somov,Samo Stanič,Marko Starič,K. Sumisawa,T. Sumiyoshi,Fumihiko Takasaki,Manobu Tanaka,Geoffrey N. Taylor,Y. Teramoto,I. N. Tikhomirov,S. Uehara,Koji Ueno, Y. Unno,S. Uno,Phillip Urquijo,Yu V. Usov,Gary S. Varner,Kevin E. Varvell,Kim Vervink,Stefano Villa,Chunghsiang Wang, P. Wang,Xiaolong Wang, Y. Watanabe,R. Wedd,E. Won,Hitoshi Yamamoto, Y. Yamashita,C. C. Zhang,Ziping Zhang,Vladimir V. Zhulanov, A. Zupanc

23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007（2007）

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摘要

We report improved measurements of time-dependent CP violation parameters for B0 (B0) → (2S)K0 S . This analysis is based on a data sample of 657×106 BB pairs collected at the γ(4S) res- onance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the (2S)K0 S CP-eigenstate decay channel, and the flavor of the accompa- nying B meson is identified to be either B0 or B0 from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays: S (2S)K0 S = +0.72 ± 0.09(stat) ± 0.03(syst), A (2S)K0S = +0.04 ± 0.07(stat) ± 0.05(syst). These results are in agreement with results from measurements of B0 → J/ ψ K0.

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