Observation of Ds+K- and evidence for Ds+π- final states in neutral B decays -: art. no. 231804

被引：38

作者：

Krokovny, P ^{[1
]}

Abe, K

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

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, SK

Choi, Y

Danilov, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Everton, CW

Fang, F

Fukunaga, C

Gabyshev, N

Garmash, A

Gershon, T

Golob, B

Gordon, A

Guo, R

Haba, J

Hanagaki, K

Handa, F

机构：

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

[2] Aomori Univ, Aomori, Japan

[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] Korea Univ, Seoul 136701, South Korea

[16] Kyoto Univ, Kyoto, Japan

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

[18] Univ Lausanne, Inat Phys Hautes Energies, Lausanne, Switzerland

[19] Univ Ljubljana, Ljubljana, Slovenia

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

[21] Univ Melbourne, Parkville, Vic 3052, Australia

[22] Nagoya Univ, Nagoya, Aichi, Japan

[23] Nara Womens Univ, Nara 630, Japan

[24] Natl Kaohsiung Normal Inst, Kaohsiung, Taiwan

[25] Natl Lien Ho Inst Technol, Miao Li, Peoples R China

[26] Natl Taiwan Univ, Taipei 10764, Taiwan

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

[28] Nihon Dent Coll, Niigata, Japan

[29] Niigata Univ, Niigata, Japan

[30] Osaka City Univ, Osaka 558, Japan

[31] Osaka Univ, Osaka, Japan

[32] Panjab Univ, Chandigarh 160014, India

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

[34] Princeton Univ, Princeton, NJ 08544 USA

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

[36] Saga Univ, Saga 840, Japan

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

[38] Seoul Natl Univ, Seoul, South Korea

[39] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

[45] Univ Tokyo, Tokyo, Japan

[46] Tokyo Inst Technol, Tokyo 152, Japan

[47] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.89.231804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel (B) over bar (0)-->Ds+K- is found in a sample of 85x10(6) B (B) over bar events, collected with the Belle detector at KEKB, with a branching fraction B((B) over bar (0)-->Ds+K-)=(4.6(-1.1)(+1.2)+/-1.3)x10(-5). We also obtain evidence for the B-0-->D(s)(+)pi(-) decay with branching fraction B(B-0-->D(s)(+)pi(-))=(2.4(-0.8)(+1.0)+/-0.7)x10(-5). This value may be used to extract a model-dependent value of \V-ub\.

引用

页数：6

共 18 条

[1] The Belle detector [J].

Abashian, A ;

Abe, K ;

Abe, R ;

Abe, K ;

Adachi, I ;

Ahn, BS ;

Ahn, HS ;

Aihara, H ;

Akatsu, M ;

Akhmetshin, R ;

Alexander, JP ;

Alimonti, G ;

An, Q ;

Aoki, K ;

Asai, M ;

Asano, Y ;

Aso, T ;

Aulchenko, V ;

Bakich, AM ;

Banas, E ;

Behari, S ;

Behera, PK ;

Beiline, D ;

Bondar, A ;

Bozek, A ;

Browder, TE ;

Casey, BCK ;

Chang, P ;

Chang, YH ;

Chao, Y ;

Chen, HS ;

Chen, HF ;

Chen, YQ ;

Cheon, BG ;

Chidzik, S ;

Choi, S ;

Choi, Y ;

Dneprovsky, L ;

Doi, Y ;

Dong, LY ;

Dragic, J ;

Drutskoy, A ;

Eidelman, S ;

Enomoto, R ;

Everton, CW ;

Fang, F ;

Fujii, H ;

Fujimoto, K ;

Fujita, Y ;

Fukunaga, C .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 479 (01) :117-232

[2]

ABE K, 2002, PHYS REV LETT, V88

[3]

ABE K, HEPEX0210037

[4] Electroweak radiative corrections to polarized Moller scattering asymmetries [J].

Czarnecki, A ;

Marciano, WJ .

PHYSICAL REVIEW D, 1996, 53 (03) :1066-1072

[5]

AUBERT B, HEPEX0207092

[6]

AUBERT B, HEPEX0205102

[7] Annihilation, rescattering, and CP asymmetries in B meson decays [J].

Blok, B ;

Gronau, M ;

Rosner, JL .

PHYSICAL REVIEW LETTERS, 1997, 78 (21) :3999-4002

[8] Observation of B→φK and B→φK [J].

Brier, RA ;

Chen, GP ;

Ferguson, T ;

Vogel, H ;

Gritsan, A ;

Alexander, JP ;

Baker, R ;

Bebek, C ;

Berger, BE ;

Berkelman, K ;

Blanc, F ;

Boisvert, V ;

Cassel, DG ;

Drell, PS ;

Duboscq, JE ;

Ecklund, KM ;

Ehrlich, R ;

Gaidarev, P ;

Gibbons, L ;

Gittelman, B ;

Gray, SW ;

Hartill, DL ;

Heltsley, BK ;

Hopman, PI ;

Hsu, L ;

Jones, CD ;

Kandaswamy, J ;

Kreinick, DL ;

Lohner, M ;

Magerkurth, A ;

Meyer, TO ;

Mistry, NB ;

Nordberg, E ;

Palmer, M ;

Patterson, JR ;

Peterson, D ;

Riley, D ;

Romano, A ;

Thayer, JG ;

Urner, D ;

Valant-Spaight, B ;

Viehhauser, G ;

Warburton, A ;

Avery, P ;

Prescott, C ;

Rubiera, AI ;

Stoeck, H ;

Yelton, J ;

Brandenburg, G ;

Ershov, A .

PHYSICAL REVIEW LETTERS, 2001, 86 (17) :3718-3721

[9]

Brun R., 1984, CERN Report No. DD/EE/84-1

[10]

Chua CK, 2002, PHYS REV D, V65, DOI 10.1103/PhysRevD.65.096007

← 1 2 →