Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays

被引：116
|
作者：
Chen, K. -F. [1 ]
Hara, K.
Hazumi, M.
Higuchi, T.
Miyabayashi, K.
Nakahama, Y.
Sumisawa, K.
Tajima, O.
Ushiroda, Y.
Yusa, Y.
Abe, K.
Abe, K.
Adachi, I.
Aihara, H.
Anipko, D.
Arinstein, K.
Aulchenko, V.
Aushev, T.
Aziz, T.
Bakich, A. M.
Balagura, V.
Banerjee, S.
Barberio, E.
Barbero, M.
Bay, A.
Belous, K.
Bitenc, U.
Bizjak, I.
Blyth, S.
Bondar, A.
Bozek, A.
Bracko, M.
Brodzicka, J.
Browder, T. E.
Chang, P.
Chao, Y.
Chen, A.
Chen, W. T.
Cheon, B. G.
Chistov, R.
Choi, S. -K.
Choi, Y.
Choi, Y. K.
Chuvikov, A.
Cole, S.
Dalseno, J.
Danilov, M.
Dash, M.
Dragic, J.
Drutskoy, A.
机构：
[1] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
[2] Natl United Univ, Miaoli, Taiwan
[3] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[4] Nippon Dent Univ, Niigata, Japan
[5] Niigata Univ, Niigata, Japan
[6] Osaka City Univ, Osaka 558, Japan
[7] Osaka Univ, Osaka, Japan
[8] Panjab Univ, Chandigarh 160014, India
[9] Peking Univ, Beijing 100871, Peoples R China
[10] Princeton Univ, Princeton, NJ 08544 USA
[11] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA
[12] Saga Univ, Saga 840, Japan
[13] Univ Sci & Technol China, Hefei 230026, Peoples R China
[14] Seoul Natl Univ, Seoul, South Korea
[15] Shinshu Univ, Nagano, Japan
[16] Sungkyunkwan Univ, Suwon 440746, South Korea
[17] Univ Sydney, Sydney, NSW 2006, Australia
[18] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[19] Toho Univ, Funabashi, Chiba 274, Japan
[20] Tohoku Gakuin Univ, Tagajo, Miyagi 985, Japan
[21] Tohoku Univ, Sendai, Miyagi 980, Japan
[22] Univ Tokyo, Dept Phys, Tokyo, Japan
[23] Tokyo Inst Technol, Tokyo, Japan
[24] Tokyo Metropolitan Univ, Tokyo 158, Japan
[25] Tokyo Univ Agr & Technol, Tokyo, Japan
[26] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA
[27] Yonsei Univ, Seoul, South Korea
[28] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[29] Chiba Univ, Chiba, Japan
[30] Chonnam Natl Univ, Kwangju 500757, South Korea
[31] Univ Cincinnati, Cincinnati, OH 45221 USA
[32] Grad Univ Adv Studies, Hayama, Japan
[33] Gyeongsang Natl Univ, Chinju, South Korea
[34] Univ Hawaii, Honolulu, HI 96822 USA
[35] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan
[36] Hiroshima Inst Technol, Hiroshima, Japan
[37] Univ Illinois, Urbana, IL 61801 USA
[38] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[39] Inst High Energy Phys, Vienna, Austria
[40] Inst High Energy Phys, Protvino, Russia
[41] Inst Theoret & Expt Phys, Moscow 117259, Russia
[42] Jozef Stefan Inst, Ljubljana, Slovenia
[43] Kanagawa Univ, Yokohama, Kanagawa, Japan
[44] Korea Univ, Seoul 136701, South Korea
[45] Kyungpook Natl Univ, Taegu 702701, South Korea
[46] Swiss Fed Inst Technol, EPFL, Lausanne, Switzerland
[47] Univ Ljubljana, Ljubljana, Slovenia
[48] Univ Maribor, SLO-2000 Maribor, Slovenia
[49] Univ Melbourne, Melbourne, Vic, Australia
[50] Nagoya Univ, Nagoya, Aichi, Japan
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.98.031802
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present improved measurements of CP-violation parameters in B-0 -> phi K-0, eta K-'(0), (KSKSKS0)-K-0-K-0 decays based on a sample of 535 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2 phi(eff)(1) = +0.64 +/- 0.10(stat) +/- 0.04(syst) for B-0 -> eta K-'(0), +0.50 +/- 0.21(stat) +/- 0.06(syst) for B-0 ->phi K-0, and +0.30 +/- 0.32(stat) +/- 0.08(syst) for B-0 -> (KSKSKS0)-K-0-K-0 decays. We have observed CP violation in the B-0 -> eta K-'(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B-0 -> J/psi K-0 decays and obtain sin2 phi(1) = +0.642 +/- 0.031(stat) +/- 0.017(syst).
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页数：6
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