Measurements of branching fractions for b -> K pi and b ->pi pi decays

	Measurements of branching fractions for b -> K pi and b ->pi pi decays
	Lin, SW; Chang, P; Abe, K; Abe, K; Adachi, I; Aihara, H; Anipko, D; Aulchenko, V; Aushev, T; Bahinipati, S
刊名	PHYSICAL REVIEW LETTERS
	2007
卷号	99 期号:12 页码:121601
通讯作者	Natl Taiwan Univ, Dept Phys, Taipei, Taiwan ; Chiba Univ, Chiba, Japan ; Univ Cincinnati, Cincinnati, OH 45221 USA ; Fu Jen Catholic Univ, Dept Phys, Taipei, Taiwan ; Grad Univ Adv Studies, Hayama, Japan ; Gyeongsang Natl Univ, Chinju, South Korea ; Hanyang Univ, Seoul 133791, South Korea ; Univ Hawaii, Honolulu, HI 96822 USA ; KEK, Tsukuba, Ibaraki, Japan ; Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China ; Inst High Energy Phys, Vienna, Austria ; Inst High Energy Phys, Protvino, Russia ; Inst Theoret & Expt Phys, Moscow 117259, Russia ; Jozef Stefan Inst, Ljubljana, Slovenia ; Kanagawa Univ, Yokohama, Kanagawa, Japan ; Korea Univ, Seoul 136701, South Korea ; Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland ; Univ Ljubljana, Ljubljana, Slovenia ; Univ Maribor, SLO-2000 Maribor, Slovenia ; Univ Melbourne, Parkville, Vic 3052, Australia ; Nagoya Univ, Nagoya, Aichi, Japan ; Nara Womens Univ, Nara 630, Japan ; Natl Cent Univ, Chungli 32054, Taiwan ; H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland ; Nippon Dent Univ, Niigata, Japan ; Niigata Univ, Niigata, Japan ; Univ Nova Gorica, Nova Gorica, Slovenia ; Osaka City Univ, Osaka 558, Japan ; Osaka Univ, Osaka, Japan ; Panjab Univ, Chandigarh 160014, India ; Peking Univ, Beijing 100871, Peoples R China ; Princeton Univ, Princeton, NJ 08544 USA ; RIKEN BNL Res Ctr, Upton, NY 11973 USA ; Saga Univ, Saga 840, Japan ; Univ Sci & Technol China, Hefei 230026, Peoples R China ; Seoul Natl Univ, Seoul, South Korea ; Shinshu Univ, Nagano, Japan ; Sungkyunkwan Univ, Suwon, South Korea ; Univ Sydney, Sydney, NSW 2006, Australia ; Toho Univ, Funabashi, Chiba 274, Japan ; Tohoku Gakuin Univ, Tagajo, Miyagi, Japan ; Tohoku Univ, Sendai, Miyagi 980, Japan ; Univ Tokyo, Dept Phys, Tokyo 113, Japan ; Tokyo Inst Technol, Tokyo 152, Japan ; Tokyo Metropolitan Univ, Tokyo 158, Japan ; Tokyo Univ Agr & Technol, Tokyo, Japan ; Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA ; Yonsei Univ, Seoul 120749, South Korea ; Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia ; Budker Inst Nucl Phys, Novosibirsk 630090, Russia
英文摘要	We report measurements of branching fractions for B -> K pi and B ->pi pi decays based on a data sample of 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B -> K pi decays, namely R-c equivalent to 2 Gamma(B+-> K+pi(0))/Gamma(B+-> K-0 pi(+))=1.08 +/- 0.06 +/- 0.08 and R-n equivalent to Gamma(B-0 -> K+pi(-))/2 Gamma(B-0 -> K-0 pi(0))=1.08 +/- 0.08 +/- 0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000249668000019
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240974]
专题	高能物理研究所_实验物理中心高能物理研究所_粒子天体物理中心中国科学院高能物理研究所_中国散裂中子源
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Lin, SW,Chang, P,Abe, K,et al. Measurements of branching fractions for b -> K pi and b ->pi pi decays[J]. PHYSICAL REVIEW LETTERS,2007,99(12):121601.
APA	Lin, SW.,Chang, P.,Abe, K.,Abe, K.,Adachi, I.,...&Zupanc, A.(2007).Measurements of branching fractions for b -> K pi and b ->pi pi decays.PHYSICAL REVIEW LETTERS,99(12),121601.
MLA	Lin, SW,et al."Measurements of branching fractions for b -> K pi and b ->pi pi decays".PHYSICAL REVIEW LETTERS 99.12(2007):121601.