Observation of large CP violation in the neutral B meson system -: art. no. 091802

被引：534

作者：

Abe, K ^{[1
]}

Abe, R

Adachi, I

Ahn, BS

Aihara, H

Akatsu, M

Alimonti, G

Asai, K

Asai, M

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Banas, E

Behari, S

Behara, PK

Beiline, D

Bondar, A

Bozek, A

Browder, TE

Casey, BCK

Chang, P

Chao, Y

Chen, KF

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Dong, LY

Dragic, J

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Enomoto, R

Everton, CW

Fang, F

Fujii, H

Fukunaga, C

Fukushima, M

Gabyshev, N

Garmash, A

Gershon, TJ

Gordon, A

Gotow, K

Guler, H

Guo, R

Haba, J

机构：

[1] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan

[2] Aomori Univ, Aomori, Japan

[3] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[4] Chiba Univ, Chiba, Japan

[5] Chuo Univ, Tokyo 112, Japan

[6] Univ Cincinnati, Cincinnati, OH USA

[7] Univ Frankfurt, D-6000 Frankfurt, Germany

[8] Gyeongsang Natl Univ, Chinju, South Korea

[9] Univ Hawaii, Honolulu, HI 96822 USA

[10] Hiroshima Inst Technol, Hiroshima, Japan

[11] Univ Tokyo, Inst Cosm Ray Res, Tokyo, Japan

[12] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[13] Inst High Energy Phys, Vienna, Austria

[14] Inst Theoret & Expt Phys, Moscow 117259, Russia

[15] Kanagawa Univ, Yokohama, Kanagawa, Japan

[16] Korea Univ, Seoul 136701, South Korea

[17] Kyoto Univ, Kyoto, Japan

[18] Kyungpook Natl Univ, Taegu 702701, South Korea

[19] Univ Melbourne, Parkville, Vic 3052, Australia

[20] Nagoya Univ, Nagoya, Aichi, Japan

[21] Nara Womens Univ, Nara 630, Japan

[22] Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan

[23] Natl Lien Ho Inst Technol, Miaoli, Taiwan

[24] Natl Taiwan Univ, Taipei 10764, Taiwan

[25] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[26] Nihon Dent Coll, Niigata, Japan

[27] Niigata Univ, Niigata, Japan

[28] Osaka City Univ, Osaka 558, Japan

[29] Osaka Univ, Osaka, Japan

[30] Panjab Univ, Chandigarh 160014, India

[31] Princeton Univ, Princeton, NJ 08544 USA

[32] Saga Univ, Saga 840, Japan

[33] Seoul Natl Univ, Seoul, South Korea

[34] Sungkyunkwan Univ, Suwon, South Korea

[35] Univ Sydney, Sydney, NSW 2006, Australia

[36] Toho Univ, Funabashi, Chiba 274, Japan

[37] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[38] Tohoku Univ, Sendai, Miyagi 980, Japan

[39] Univ Tokyo, Tokyo, Japan

[40] Tokyo Inst Technol, Tokyo 152, Japan

[41] Tokyo Metropolitan Univ, Tokyo 158, Japan

[42] Tokyo Univ Agr & Technol, Tokyo, Japan

[43] Toyama Natl Coll Maritime Technol, Toyama, Japan

[44] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[45] Utkal Univ, Bhubaneswar 751004, Orissa, India

[46] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[47] Yokkaichi Univ, Yokaichi, Japan

[48] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.87.091802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a measurement of the standard model CP violation parameter sin2 phi (1) based on a 29.1 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson is fully reconstructed as a J/psiK(S), psi (2S)K(S), X(c1)K(S), eta (c)K(S), J/psiK(L), or J/psiK*(0) decay and the flavor of the accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we determine sin2 phi (1) = 0.99 +/-0.14(stat) +/-0.06(syst). We conclude that we have observed CP violation in the neutral B meson system.

引用

页数：7

共 17 条

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