Observation of the Doubly Strange b Baryon Ωb-

被引：89

作者：

Abazov, V. M. ^{[1
]}

Abbott, B. ^{[84
]}

Abolins, M. ^{[74
]}

Acharya, B. S. ^{[35
]}

Adams, M. ^{[60
]}

Adams, T. ^{[58
]}

Aguilo, E. ^{[7
,8
,9
,10
]}

Ahsan, M. ^{[68
]}

Alexeev, G. D. ^{[1
]}

Alkhazov, G. ^{[46
]}

Alton, A. ^{[1
,73
]}

Alverson, G. ^{[72
]}

Alves, G. A. ^{[3
]}

Anastasoaie, M. ^{[40
]}

Ancu, L. S. ^{[40
]}

Andeen, T. ^{[62
]}

Andrieu, B. ^{[21
,22
]}

Anzelc, M. S. ^{[62
]}

Aoki, M. ^{[59
]}

Arnoud, Y. ^{[18
]}

Arov, M. ^{[69
]}

Arthaud, M. ^{[23
]}

Askew, A. ^{[58
]}

Asman, B. ^{[47
,48
,49
,50
]}

Assis Jesus, A. C. S. ^{[4
]}

Atramentov, O. ^{[58
]}

Avila, C. ^{[12
]}

Badaud, F. ^{[17
]}

Bagby, L. ^{[59
]}

Baldin, B. ^{[59
]}

Bandurin, D. V. ^{[68
]}

Banerjee, P. ^{[35
]}

Banerjee, S. ^{[35
]}

Barberis, E. ^{[72
]}

Barfuss, A. -F. ^{[19
]}

Bargassa, P. ^{[89
]}

Baringer, P. ^{[67
]}

Barreto, J. ^{[3
]}

Bartlett, J. F. ^{[59
]}

Bassler, U. ^{[23
]}

Bauer, D. ^{[52
]}

Beale, S. ^{[7
,8
,9
,10
]}

Bean, A. ^{[67
]}

Begalli, M. ^{[4
]}

Begel, M. ^{[82
]}

Belanger-Champagne, C. ^{[47
,48
,49
,50
]}

Bellantoni, L. ^{[59
]}

Bellavance, A. ^{[59
]}

Benitez, J. A. ^{[74
]}

Beri, S. B. ^{[33
]}

机构：

[1] Joint Inst Nucl Res, Dubna, Russia

[2] Univ Buenos Aires, Buenos Aires, DF, Argentina

[3] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil

[4] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil

[5] Univ Fed ABC, Santo Andre, Brazil

[6] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

[7] Univ Alberta, Edmonton, AB, Canada

[8] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[9] York Univ, Toronto, ON M3J 2R7, Canada

[10] McGill Univ, Montreal, PQ H3A 2T5, Canada

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

[12] Univ Los Andes, Bogota, Colombia

[13] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic

[14] Czech Tech Univ, CR-16635 Prague, Czech Republic

[15] Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic

[16] Univ San Francisco Quinto, Quito, Ecuador

[17] Univ Clermont Ferrand, CNRS, IN2P3, LPC, Clermont, France

[18] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPSC, Grenoble, France

[19] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[20] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France

[21] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France

[22] Univ Paris 07, Paris, France

[23] CEA, Irfu, SPP, Saclay, France

[24] Univ Strasbourg 1, CNRS, IN2P3, IPHC, Strasbourg, France

[25] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France

[26] Univ Lyon, Lyon, France

[27] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[28] Univ Bonn, Inst Phys, D-5300 Bonn, Germany

[29] Univ Freiburg, Inst Phys, Freiburg, Germany

[30] Univ Munich, Munich, Germany

[31] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany

[32] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[33] Panjab Univ, Chandigarh 160014, India

[34] Univ Delhi, Delhi 110007, India

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

[36] Univ Coll Dublin, Dublin 2, Ireland

[37] Korea Univ, Korea Detector Lab, Seoul, South Korea

[38] Sungkyunkwan Univ, Suwon, South Korea

[39] CINVESTAV, Mexico City 14000, DF, Mexico

[40] Radboud Univ Nijmegen, NIKHEF H, NL-6525 ED Nijmegen, Netherlands

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

[42] Moscow MV Lomonosov State Univ, Moscow, Russia

[43] NIKHEF H, FOM Inst, NL-1009 DB Amsterdam, Netherlands

[44] Univ Amsterdam, NIKHEF H, Amsterdam, Netherlands

[45] Inst High Energy Phys, Protvino, Russia

[46] Petersburg Nucl Phys Inst, St Petersburg, Russia

[47] Stockholm Univ, S-10691 Stockholm, Sweden

[48] Royal Inst Technol, Stockholm, Sweden

[49] Lund Univ, Lund, Sweden

[50] Uppsala Univ, Uppsala, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 23期

基金：

巴西圣保罗研究基金会; 瑞典研究理事会; 加拿大自然科学与工程研究理事会; 英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.232002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of the doubly strange b baryon Omega(-)(b) in the decay channel Omega(-)(b) -> J/psi Omega(-), with J/psi -> mu(+)mu(-) and Omega(-) -> Lambda K- -> (p pi(-))K-, in p (p) over bar collisions at root s = 1.96 TeV. Using approximately 1.3 fb(-1) of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17.8 +/- 4.9(stat) +/- 0.8(syst) Omega(-)(b) signal events at a mass of 6.165 +/- 0.010(stat) +/- 0.013(syst) GeV. The significance of the observed signal is 5.4 sigma, corresponding to a probability of 6.7 x 10(-8) of it arising from a background fluctuation.

引用

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