Phys. Rev. D
77,
091103(R)
(2008)
[6 pages]
Measurements of time-dependent CP violation in B0→ψ(2S)KS0 decays
H. Sahoo et al. Belle Collaboration
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H. Sahoo6, T. E. Browder6, K. Trabelsi7, I. Adachi7, H. Aihara40, K. Arinstein1, T. Aushev11,16, S. Bahinipati2, A. M. Bakich35, V. Balagura11, E. Barberio19, A. Bay16, I. Bedny1, K. Belous10, U. Bitenc12, A. Bondar1, A. Bozek25, M. Bračko12,18, M.-C. Chang3, Y. Chao24, A. Chen22, W. T. Chen22, B. G. Cheon5, R. Chistov11, I.-S. Cho45, Y. Choi34, J. Dalseno19, M. Dash44, A. Drutskoy2, S. Eidelman1, B. Golob12,17, H. Ha14, J. Haba7, K. Hara20, T. Hara30, K. Hayasaka20, H. Hayashii21, M. Hazumi7, D. Heffernan30, Y. Hoshi38, W.-S. Hou24, Y. B. Hsiung24, H. J. Hyun15, K. Inami20, A. Ishikawa31, H. Ishino41, R. Itoh7, M. Iwasaki40, N. J. Joshi36, D. H. Kah15, J. H. Kang45, P. Kapusta25, N. Katayama7, H. Kichimi7, H. J. Kim15, Y. J. Kim4, K. Kinoshita2, S. Korpar12,18, Y. Kozakai20, P. Križan12,17, P. Krokovny7, R. Kumar46, C. C. Kuo22, Y. Kuroki30, Y.-J. Kwon45, J. S. Lee34, M. J. Lee33, S. E. Lee33, T. Lesiak25, J. Li6, A. Limosani19, D. Liventsev11, F. Mandl9, A. Matyja25, S. McOnie35, T. Medvedeva11, W. Mitaroff9, K. Miyabayashi21, H. Miyake30, H. Miyata27, Y. Miyazaki20, R. Mizuk11, G. R. Moloney19, E. Nakano29, M. Nakao7, Z. Natkaniec25, S. Nishida7, O. Nitoh43, S. Noguchi21, S. Ogawa37, T. Ohshima20, S. Okuno13, S. L. Olsen6,8, P. Pakhlov11, G. Pakhlova11, H. Palka25, C. W. Park34, H. Park15, L. S. Peak35, R. Pestotnik12, L. E. Piilonen44, Y. Sakai7, O. Schneider16, C. Schwanda9, A. J. Schwartz2, K. Senyo20, M. E. Sevior19, M. Shapkin10, C. P. Shen8, H. Shibuya37, J.-G. Shiu24, B. Shwartz1, A. Somov2, S. Stanič28, M. Starič12, K. Sumisawa7, T. Sumiyoshi42, F. Takasaki7, M. Tanaka7, G. N. Taylor19, Y. Teramoto29, I. Tikhomirov11, S. Uehara7, K. Ueno24, Y. Unno5, S. Uno7, P. Urquijo19, Y. Usov1, G. Varner6, K. E. Varvell35, K. Vervink16, S. Villa16, C. H. Wang23, P. Wang8, X. L. Wang8, Y. Watanabe13, R. Wedd19, E. Won14, H. Yamamoto39, Y. Yamashita26, C. C. Zhang8, Z. P. Zhang32, V. Zhulanov1, and A. Zupanc12 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2University of Cincinnati, Cincinnati, Ohio 45221
3Department of Physics, Fu Jen Catholic University, Taipei
4The Graduate University for Advanced Studies, Hayama
5Hanyang University, Seoul
6University of Hawaii, Honolulu, Hawaii 96822
7High Energy Accelerator Research Organization (KEK), Tsukuba
8Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
9Institute of High Energy Physics, Vienna
10Institute of High Energy Physics, Protvino
11Institute for Theoretical and Experimental Physics, Moscow
12J. Stefan Institute, Ljubljana
13Kanagawa University, Yokohama
14Korea University, Seoul
15Kyungpook National University, Taegu
16École Polytechnique Fédérale de Lausanne (EPFL), Lausanne
17Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana
18University of Maribor, Maribor
19University of Melbourne, School of Physics, Victoria 3010
20Nagoya University, Nagoya
21Nara Women’s University, Nara
22National Central University, Chung-li
23National United University, Miao Li
24Department of Physics, National Taiwan University, Taipei
25H. Niewodniczanski Institute of Nuclear Physics, Krakow
26Nippon Dental University, Niigata
27Niigata University, Niigata
28University of Nova Gorica, Nova Gorica
29Osaka City University, Osaka
30Osaka University, Osaka
31Saga University, Saga
32University of Science and Technology of China, Hefei
33Seoul National University, Seoul
34Sungkyunkwan University, Suwon
35University of Sydney, Sydney, New South Wales
36Tata Institute of Fundamental Research, Mumbai
37Toho University, Funabashi
38Tohoku Gakuin University, Tagajo
39Tohoku University, Sendai
40Department of Physics, University of Tokyo, Tokyo
41Tokyo Institute of Technology, Tokyo
42Tokyo Metropolitan University, Tokyo
43Tokyo University of Agriculture and Technology, Tokyo
44Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
45Yonsei University, Seoul
46Panjab University, Chandigarh
Received 4 February 2008; published 13 May 2008
We report improved measurements of time-dependent CP violation parameters for B0(B̅ 0)→ψ(2S)KS0. This analysis is based on a data sample of 657×106 BB̅ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the ψ(2S)KS0 CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B0 or B̅ 0 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: Sψ(2S)KS0=+0.72±0.09(stat)±0.03(syst), Aψ(2S)KS0=+0.04±0.07(stat)±0.05(syst). These results are in agreement with results from measurements of B0→J/ψK0.
© 2008 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.77.091103
DOI:
10.1103/PhysRevD.77.091103
PACS:
11.30.Er, 12.15.Hh, 13.25.Hw
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