Measurement of time-dependent CP-violating asymmetries in B0→φKS0, K+K-KS0, and η′KS0 decays -: art. no. 261602

被引：87
|
作者：
Abe, K [1 ]
Abe, K [1 ]
Abe, T
Adachi, I
Aihara, H
Akai, K
Akatsu, M
Asano, Y
Aso, T
Aushev, T
Bahinipati, S
Bakich, AM
Ban, Y
Banerjee, S
Bedny, I
Bizjak, I
Bondar, A
Bozek, A
Bracko, M
Brodzicka, J
Browder, TE
Chang, MC
Chang, P
Chao, Y
Chen, KF
Cheon, BG
Chistov, R
Choi, SK
Choi, Y
Choi, YK
Chuvikov, A
Danilov, M
Dong, LY
Eidelman, S
Eiges, V
Enari, Y
Flanagan, J
Fukunaga, C
Furukawa, K
Gabyshev, N
Garmash, A
Gershon, T
Golob, B
Guo, R
Haba, J
Hagner, C
Hara, K
Hara, T
Hastings, NC
Hayashii, H
机构：
[1] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan
[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[3] Chiba Univ, Chiba, Japan
[4] Univ Cincinnati, Cincinnati, OH 45221 USA
[5] Univ Frankfurt, D-6000 Frankfurt, Germany
[6] Gyeongsang Natl Univ, Chinju, South Korea
[7] Univ Hawaii, Honolulu, HI 96822 USA
[8] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan
[9] Hiroshima Inst Technol, Hiroshima, Japan
[10] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[11] Inst High Energy Phys, Vienna, Austria
[12] Inst Theoret & Expt Phys, Moscow 117259, Russia
[13] Jozef Stefan Inst, Ljubljana, Slovenia
[14] Kanagawa Univ, Yokohama, Kanagawa, Japan
[15] Korea Univ, Seoul 136701, South Korea
[16] Kyungpook Natl Univ, Taegu 702701, South Korea
[17] Univ Lausanne, Inst Phys Hautes Energies, Lausanne, Switzerland
[18] Univ Ljubljana, Ljubljana, Slovenia
[19] Univ Maribor, SLO-2000 Maribor, Slovenia
[20] Univ Melbourne, Parkville, Vic 3052, Australia
[21] Nagoya Univ, Nagoya, Aichi, Japan
[22] Nara Womens Univ, Nara 630, Japan
[23] Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan
[24] Natl Lien Ho Inst Technol, Miaoli, Taiwan
[25] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan
[26] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[27] Nihon Dent Coll, Niigata, Japan
[28] Niigata Univ, Niigata, Japan
[29] Osaka City Univ, Osaka 558, Japan
[30] Osaka Univ, Osaka, Japan
[31] Panjab Univ, Chandigarh 160014, India
[32] Peking Univ, Beijing 100871, Peoples R China
[33] Princeton Univ, Princeton, NJ 08545 USA
[34] RIKEN BNL Res Ctr, Upton, NY 11973 USA
[35] Saga Univ, Saga 840, Japan
[36] Univ Sci & Technol China, Hefei 230026, Peoples R China
[37] Seoul Natl Univ, Seoul, South Korea
[38] Sungkyunkwan Univ, Suwon, South Korea
[39] Univ Sydney, Sydney, NSW 2006, Australia
[40] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[41] Toho Univ, Funabashi, Chiba 274, Japan
[42] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan
[43] Tohoku Univ, Sendai, Miyagi 980, Japan
[44] Univ Tokyo, Dept Phys, Tokyo 113, Japan
[45] Tokyo Inst Technol, Tokyo 152, Japan
[46] Tokyo Metropolitan Univ, Tokyo 158, Japan
[47] Tokyo Univ Agr & Technol, Tokyo, Japan
[48] Toyama Natl Coll Maritime Technol, Toyama, Japan
[49] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan
[50] Utkal Univ, Bhubaneswar 751004, Orissa, India
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.91.261602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present an improved measurement of CP-violation parameters in B(0)-->phiK(S)(0), K(+)K(-)K(S)(0), and eta(')K(S)(0) decays based on a 140 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B-->phiK(S)(0) decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM.
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页数：6
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