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, 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.

引用

页数：6

共 50 条

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