Measurement of the inclusive semileptonic branching fraction of B mesons and |Vcb|

被引：13

作者：

Abe, K ^{[1
]}

Abe, T

Adachi, I

Ahn, BS

Aihara, H

Akatsu, M

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Ban, Y

Banas, E

Bay, A

Bedny, I

Behera, PK

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Casey, BCK

Chang, P

Chao, Y

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Danilov, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Fukunaga, C

Gabyshev, N

Garmash, A

Gershon, T

Golob, B

Gotow, K

Guo, R

Hanagaki, K

Handa, F

Hara, K

Hara, T

Hastings, NC

Hayashii, H

Hazumi, M

机构：

[1] Aomori Univ, Aomori, Japan

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

[3] Chiba Univ, Chiba, Japan

[4] Chuo Univ, Tokyo 112, Japan

[5] Univ Cincinnati, Cincinnati, OH USA

[6] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[7] Gyeongsang Natl Univ, Chinju, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

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

[10] Hiroshima Inst Technol, Hiroshima, Japan

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

[12] Inst High Energy Phys, Vienna, Austria

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

[14] Jozef Stefan Inst, Ljubljana, Slovenia

[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 Lausanne, Inst Phys Hautes Energies, Lausanne, Switzerland

[20] Univ Ljubljana, Ljubljana, Slovenia

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

[22] Univ Melbourne, Melbourne, Vic, Australia

[23] Nagoya Univ, Nagoya, Aichi, Japan

[24] Nara Womens Univ, Nara 630, Japan

[25] Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan

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

[27] Natl Taiwan Univ, Taipei 10764, Taiwan

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

[29] Nihon Dent Coll, Niigata, Japan

[30] Niigata Univ, Niigata, Japan

[31] Osaka City Univ, Osaka 558, Japan

[32] Osaka Univ, Osaka, Japan

[33] Panjab Univ, Chandigarh 160014, India

[34] Peking Univ, Beijing 100871, Peoples R China

[35] Princeton Univ, Princeton, NJ 08544 USA

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

[37] Saga Univ, Saga 840, Japan

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

[39] Seoul Natl Univ, Seoul, South Korea

[40] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

[46] Univ Tokyo, Tokyo, Japan

[47] Tokyo Inst Technol, Tokyo 152, Japan

[48] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

来源：

PHYSICS LETTERS B | 2002年 / 547卷 / 3-4期

基金：

日本学术振兴会; 中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

CKM matrix; semileptonic; B decays; inclusive;

D O I：

10.1016/S0370-2693(02)02770-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of the electron spectrum from inclusive semileptonic B decay, using 5.1 fb(-1) of Y(4S) data collected with the Belle detector. A high-momentum lepton tag was used to separate the semileptonic B decay electrons from secondary decal electrons. We obtained the branching fraction, B(B --> Xe(+)v) = (10.90 +/- 0.12 +/- 0.49)%, with minimal model dependence, From this measurement, we derive a value for the Cabibbo-Kobayashi-Maskawa matrix element [V-cb] =0.0408 +/- 0.0010(exp) 0.0025(th). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：181 / 192

页数：12

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