Observation of the decay (B)over-bar0→Λc+(p)over-bar -: art. no. 121802

被引：41

作者：

Gabyshev, N ^{[1
]}

Kichimi, H

Abe, K

Abe, R

Abe, T

Adachi, I

Aihara, H

Akatsu, M

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Ban, Y

Banas, E

Bay, A

Bedny, I

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Casey, BCK

Chang, MC

Chang, P

Chao, Y

Chen, KF

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Choi, YK

Danilov, M

Dong, LY

Dragic, J

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Fukunaga, C

Garmash, A

Gershon, T

Golob, B

Haba, J

Hagner, C

Handa, F

Hara, T

机构：

[1] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, 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 45221 USA

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

[7] Gyeongsang Natl Univ, Chinju, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

[9] Hiroshima Inst Technol, Hiroshima, Japan

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

[11] Inst High Energy Phys, Vienna, Austria

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

[13] Jozef Stefan Inst, Ljubljana, Slovenia

[14] Kanagawa Univ, Yokohama, Kanagawa, Japan

[15] Korea Univ, Seoul 136701, South Korea

[16] Kyoto Univ, Kyoto, Japan

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

[18] Univ Lausanne, Inst 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 Lien Ho Inst Technol, Miaoli, Taiwan

[25] Natl Taiwan Univ, Taipei 10764, Taiwan

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

[27] Nihon Dent Coll, Niigata, Japan

[28] Niigata Univ, Niigata, Japan

[29] Osaka City Univ, Osaka 558, Japan

[30] Osaka Univ, Osaka, Japan

[31] Panjab Univ, Chandigarh 160014, India

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

[33] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA

[34] Saga Univ, Saga 840, Japan

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

[36] Seoul Natl Univ, Seoul, South Korea

[37] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

[43] Tokyo Inst Technol, Tokyo 152, Japan

[44] Univ Tokyo, Tokyo, Japan

[45] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

[49] Utkal Univ, Bhubaneswar 751004, Orissa, India

[50] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.90.121802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the measurement of the charmed baryonic decay (B) over bar (0) --> Lambda(c)(+) (p) over bar with a branching fraction of (2.19(-0.49)(+0.56) +/- 0.32 +/- 0.57) x 10(-5) and a statistical significance of 5.8 sigma. The errors are statistical, systematic, and the error of the Lambda(c)(+) --> pK(-)pi(+) decay branching fraction. This is the first observation of a two-body baryonic B decay. The analysis is based on 78.2 fb(-1) of data accumulated at the Y(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) collider.

引用

页数：5

共 17 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 D, V65, DOI 10.1103/PhysRevD.65.091103

[3] Measurements of branching fractions and decay amplitudes in B→J/ψ K* decays [J].

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 ;

Behera, PK ;

Bondar, A ;

Bozek, A ;

Browder, TE ;

Casey, BCK ;

Chao, Y ;

Cheon, BG ;

Chistov, R ;

Choi, SK ;

Choi, Y ;

Danilov, M ;

Dong, LY ;

Eidelman, S ;

Eiges, V ;

Enari, Y ;

Fang, F ;

Fukunaga, C ;

Gershon, T ;

Gotow, K ;

Guo, R ;

Haba, J ;

Hanagaki, K ;

Hara, T ;

Hayashii, H ;

Hazumi, M ;

Heenan, EM ;

Higuchi, I ;

Higuchi, T ;

Hokuue, T ;

Hoshi, Y ;

Hou, SR ;

Hou, WS ;

Huang, HC ;

Igaki, T ;

Iijima, T .

PHYSICS LETTERS B, 2002, 538 (1-2) :11-20

[4] SEARCH FOR HADRONIC B-]U DECAYS [J].

ALBRECHT, H ;

GLASER, R ;

HARDER, G ;

KRUGER, A ;

NILSSON, AW ;

NIPPE, A ;

OEST, T ;

REIDENBACH, M ;

SCHAFER, M ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

SEFKOW, F ;

WURTH, R ;

APPUHN, RD ;

DRESCHER, A ;

HAST, C ;

HERRERA, G ;

KOLANOSKI, H ;

LANGE, A ;

LINDNER, A ;

MANKEL, R ;

SCHECK, H ;

SCHWEDA, G ;

SPAAN, B ;

WALTHER, A ;

WEGENER, D ;

PAULINI, M ;

REIM, K ;

VOLLAND, U ;

WEGENER, H ;

FUNK, W ;

STIEWE, J ;

WERNER, S ;

BALL, S ;

GABRIEL, JC ;

GEYER, C ;

HOLSCHER, A ;

HOFMANN, W ;

HOLZER, B ;

KHAN, S ;

SPENGLER, J ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

FRISKEN, WR ;

KAPITZA, H ;

KRIEGER, P ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCLEAN, KW .

PHYSICS LETTERS B, 1990, 241 (02) :278-282

[5] SEARCH FOR B-]S-GAMMA IN EXCLUSIVE DECAYS OF B-MESONS [J].

ALBRECHT, H ;

GLASER, R ;

HARDER, G ;

KRUGER, A ;

NIPPE, A ;

OEST, T ;

REIDENBACH, M ;

SCHAFER, M ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

SEFKOW, F ;

WURTH, R ;

APPUHN, RD ;

DRESCHER, A ;

HAST, C ;

HERRERA, G ;

KOLANOSKI, H ;

LANGE, A ;

LINDNER, A ;

MANKEL, R ;

SCHECK, H ;

SCHWEDA, G ;

SPAAN, B ;

WALTHER, A ;

WEGENER, D ;

PAULINI, M ;

REIM, K ;

VOLLAND, U ;

WEGENER, H ;

FUNK, W ;

STIEWE, J ;

WERNER, S ;

BALL, S ;

GABRIEL, JC ;

GEYER, C ;

HOLSCHER, A ;

HOFMANN, W ;

HOLZER, B ;

KHAN, S ;

SPENGLER, J ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

FRISKEN, WR ;

KAPITZA, H ;

KRIEGER, P ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCLEAN, KW ;

ORR, RS .

PHYSICS LETTERS B, 1989, 229 (03) :304-308

[6] BRANCHING RATIOS OF EXCLUSIVE DECAYS OF BOTTOM MESONS INTO BARYON-ANTIBARYON PAIRS [J].

BALL, P ;

DOSCH, HG .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1991, 51 (03) :445-453

[7]

BRUN R, 1984, DDEE841 CERN

[8] Charmful baryonic B decays (B)over-bar0→Λc(p)over-bar and (B)over-bar→Λc(p)over-barπ(ρ) (vol D 65, art no 054028, 2002) -: art. no. 099901 [J].

Cheng, HY ;

Yang, KC .

PHYSICAL REVIEW D, 2002, 65 (09)

[9] Charmful baryonic B decays (B)over-bar0→Λc(p)over-bar and (B)over-bar→Λc(p)over-barπ(p) -: art. no. 054028 [J].

Cheng, HY .

PHYSICAL REVIEW D, 2002, 65 (05)

[10] B-MESON EXCLUSIVE DECAYS INTO BARYONS [J].

CHERNYAK, VL ;

ZHITNITSKY, IR .

NUCLEAR PHYSICS B, 1990, 345 (01) :137-172

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