Improved measurement of mixing-induced CP violation in the neutral B meson system -: art. no. 071102

被引：226

作者：

Abe, K ^{[1
]}

Abe, T

Adachi, I

Aihara, H

Akatsu, M

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Banas, E

Bay, A

Behera, PK

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Casey, BCK

Chang, P

Chao, Y

Chen, KF

Cheon, BG

Chistov, R

Choi, Y

Choi, YK

Danilov, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Everton, CW

Fang, F

Fujii, H

Fukunaga, C

Gabyshev, N

Garmash, A

Gershon, T

Golob, B

Gotow, K

Guo, R

Haba, J

Hanagaki, K

Handa, F

Hara, K

Hara, T

Harada, Y

机构：

[1] KEK, High Energy Accelerator Res Org, 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] Univ Hawaii, Honolulu, HI 96822 USA

[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] Korea Univ, Seoul 136701, South Korea

[15] Kyoto Univ, Kyoto, Japan

[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 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 Univ, Osaka, Japan

[29] Osaka City Univ, Osaka 558, Japan

[30] Panjab Univ, Chandigarh 160014, India

[31] Princeton Univ, Princeton, NJ 08544 USA

[32] RIKEN BNL Res Ctr, Brookhaven, NY USA

[33] Saga Univ, Saga 840, Japan

[34] Univ Sci & Technol China, Hefei 230026, Peoples R China

[35] Seoul Natl Univ, Seoul, South Korea

[36] Sungkyunkwan Univ, Suwon, South Korea

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

[38] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

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

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

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

[42] Univ Tokyo, Tokyo, Japan

[43] Tokyo Inst Technol, Tokyo 152, Japan

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

[45] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

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

[50] Yokkaichi Univ, Yokaichi, Japan

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.66.071102

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an improved measurement of the standard model CP violation parameter sin 2phi(1) (also known as sin 2beta) based on a sample of 85x10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson is reconstructed in a J/psiK(S)(0), psi(2S)K(S)(0), chi(c1)K(S)(0), eta(c)K(S)(0), J/psiK*(0), or J/psiK(L)(0) CP-eigenstate decay channel and the flavor of the accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time interval between the two B meson decay points, we obtain sin 2phi(1)=0.719+/-0.074(stat)+/-0.035(syst).

引用

页数：6

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