Measurements of branching fractions and direct CP asymmetries for B → Kπ, B → ππ and B → KK decays

被引：60

作者：

Duh, Y. -T. ^{[31
]}

Wu, T. -Y. ^{[31
]}

Chang, P. ^{[31
]}

Mohanty, G. B. ^{[43
]}

Unno, Y. ^{[7
]}

Adachi, I. ^{[9
]}

Aihara, H. ^{[47
]}

Asner, D. M. ^{[36
]}

Aulchenko, V. ^{[1
,2
]}

Aushev, T. ^{[14
]}

Aziz, T. ^{[43
]}

Bakich, A. M. ^{[42
]}

Bhuyan, B. ^{[10
]}

Bischofberger, M. ^{[28
]}

Bondar, A. ^{[1
,2
]}

Bonvicini, G. ^{[52
]}

Bozek, A. ^{[32
]}

Bracko, M. ^{[15
,24
]}

Browder, T. E. ^{[8
]}

Chao, Y. ^{[31
]}

Chekelian, V. ^{[54
]}

Chen, A. ^{[29
]}

Chen, P. ^{[31
]}

Cheon, B. G. ^{[7
]}

Chistov, R. ^{[14
]}

Cho, I. -S. ^{[53
]}

Cho, K. ^{[18
]}

Chobanova, V. ^{[54
]}

Choi, Y. ^{[41
]}

Dolezal, Z. ^{[3
]}

Drutskoy, A. ^{[14
]}

Dutta, D. ^{[10
]}

Eidelman, S. ^{[1
,2
]}

Farhat, H. ^{[52
]}

Fast, J. E. ^{[36
]}

Frey, A. ^{[6
]}

Gaur, V. ^{[43
]}

Gillard, R. ^{[52
]}

Goh, Y. M. ^{[7
]}

Golob, B. ^{[15
,22
]}

Haba, J. ^{[9
]}

Hayasaka, K. ^{[27
]}

Hayashii, H. ^{[28
]}

Horii, Y. ^{[27
]}

Hoshi, Y. ^{[45
]}

Hou, W. -S. ^{[31
]}

Hsiung, Y. B. ^{[31
]}

Hyun, H. J. ^{[20
]}

Iijima, T. ^{[26
,27
]}

Ishikawa, A. ^{[46
]}

机构：

[1] Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] Gifu Univ, Gifu, Japan

[6] Univ Gottingen, Inst Phys 2, Gottingen, Germany

[7] Hanyang Univ, Seoul 133791, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

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

[10] Indian Inst Technol Guwahati, Gauhati, India

[11] Indian Inst Technol Madras, Madras, Tamil Nadu, India

[12] Inst High Energy Phys, Vienna, Austria

[13] Inst High Energy Phys, Protvino, Russia

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

[15] J Stefan Inst, Ljubljana, Slovenia

[16] Kanagawa Univ, Yokohama, Kanagawa, Japan

[17] Karlsruher Inst Technol, Inst Expt Kernphys, Karlsruhe, Germany

[18] Korea Inst Sci & Technol Informat, Taejon, South Korea

[19] Korea Univ, Seoul, South Korea

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

[21] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[22] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia

[23] Luther Coll, Decorah, IA 52101 USA

[24] Univ Maribor, SLO-2000 Maribor, Slovenia

[25] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[26] Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648601, Japan

[27] Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648601, Japan

[28] Nara Womens Univ, Nara 630, Japan

[29] Natl Cent Univ, Chungli, Taiwan

[30] Natl United Univ, Miaoli, Taiwan

[31] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

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

[33] Nippon Dent Univ, Niigata, Japan

[34] Niigata Univ, Niigata, Japan

[35] Osaka City Univ, Osaka 558, Japan

[36] Pacific NW Natl Lab, Richland, WA 99352 USA

[37] Panjab Univ, Chandigarh 160014, India

[38] Tohoku Univ, Res Ctr Electron Photon Sci, Sendai, Miyagi 980, Japan

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

[40] Seoul Natl Univ, Seoul, South Korea

[41] Sungkyunkwan Univ, Suwon, South Korea

[42] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[43] Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India

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

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

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

[47] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[48] Tokyo Inst Technol, Tokyo 152, Japan

[49] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 03期

关键词：

MONTE-CARLO; VIOLATION; PUZZLE; PHOTOS;

D O I：

10.1103/PhysRevD.87.031103

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report measurements of the branching fractions and direct CP asymmetries (A(CP)) for B -> K pi, pi pi and KK decays (but not pi(0) pi(0)) based on the final data sample of 772 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We set a 90% confidence-level upper limit for K+K- at 2.0 x 10(-7); all other decays are observed with branching fractions ranging from 10(-6) to 10(-5). In the B-0/(B) over bar (0) -> K-+/-pi(-/+) mode, we confirm Belle's previously reported large A(CP) with a value of -0.069 +/- 0.014 +/- 0.007 and a significance of 4.4 sigma. For all other flavor-specific modes, we find A(CP) values consistent with zero, including A(CP)(K+pi(0)) = +0.043 +/- 0.024 +/- 0.007 with 1.8 sigma significance. The difference of CP asymmetry between B-+/- -> K-+/- pi(0) and B-0/(B) over bar (0) K-+/-pi(-/+) is found to be Delta A(K pi) equivalent to A(CP)(K+pi(0)) - A(CP)(K+pi(-)) = +0.112 +/- 0.027 +/- 0.007 with 4.0 sigma significance. We also calculate the ratios of partial widths for the B -> K pi decays. Using our results, we test the validity of the sum rule A(CP)(K+pi(-)) + A(CP)(K-0 pi(+)) Gamma(K-0 pi(+))/Gamma(K+pi(-)) - A(CP)(K+pi(0))2 Gamma(K+pi(0))/Gamma(K+pi(-)) - A(CP)(K-0 pi(0))2 Gamma(K-0 pi(0))/Gamma(K+pi(-)) =0 and obtain a sum of -0.270 +/- 0.132 +/- 0.060 with 1:9 sigma significance. DOI: 10.1103/PhysRevD.87.031103

引用

页数：8

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