Observation of the Ξb0 Baryon

被引：33

作者：

Aaltonen, T. ^{[1
,2
]}

Alvarez Gonzalez, B. ^{[12
]}

Amerio, S. ^{[52
]}

Amidei, D. ^{[43
]}

Anastassov, A. ^{[47
]}

Annovi, A. ^{[21
]}

Antos, J. ^{[15
,16
]}

Apollinari, G. ^{[19
]}

Appel, J. A. ^{[19
]}

Apresyan, A. ^{[61
]}

Arisawa, T. ^{[73
]}

Artikov, A. ^{[17
]}

Asaadi, J. ^{[67
]}

Ashmanskas, W. ^{[19
]}

Auerbach, B. ^{[76
]}

Aurisano, A. ^{[67
]}

Azfar, F. ^{[51
]}

Badgett, W. ^{[19
]}

Barbaro-Galtieri, A. ^{[34
]}

Barnes, V. E. ^{[61
]}

Barnett, B. A. ^{[26
]}

Barria, P. ^{[56
,58
]}

Bartos, P. ^{[15
,16
]}

Bauce, M. ^{[52
,53
]}

Bauer, G. ^{[38
]}

Bedeschi, F. ^{[56
]}

Beecher, D. ^{[36
]}

Behari, S. ^{[26
]}

Bellettini, G. ^{[56
,57
]}

Bellinger, J. ^{[75
]}

Benjamin, D. ^{[18
]}

Beretvas, A. ^{[19
]}

Bhatti, A. ^{[63
]}

Binkley, M. ^{[19
]}

Bisello, D. ^{[52
,53
]}

Bizjak, I. ^{[36
]}

Bland, K. R. ^{[7
]}

Blumenfeld, B. ^{[26
]}

Bocci, A. ^{[18
]}

Bodek, A. ^{[62
]}

Bortoletto, D. ^{[61
]}

Boudreau, J. ^{[60
]}

Boveia, A. ^{[14
]}

Brigliadori, L. ^{[8
,9
]}

Brisuda, A. ^{[15
,16
]}

Bromberg, C. ^{[44
]}

Brucken, E. ^{[1
,2
]}

Bucciantonio, M. ^{[56
,57
]}

Budagov, J. ^{[17
]}

Budd, H. S. ^{[62
]}

机构：

[1] Univ Helsinki, Div High Energy Phys, Dept Phys, FIN-00014 Helsinki, Finland

[2] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[3] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Univ Athens, GR-15771 Athens, Greece

[6] Univ Autonoma Barcelona, Inst Fis Altes Energies, ICREA, E-08193 Bellaterra, Barcelona, Spain

[7] Baylor Univ, Waco, TX 76798 USA

[8] Ist Nazl Fis Nucl, I-40127 Bologna, Italy

[9] Univ Bologna, I-40127 Bologna, Italy

[10] Univ Calif Davis, Davis, CA 95616 USA

[11] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[12] Univ Cantabria, Inst Fis Cantabria, CSIC, E-39005 Santander, Spain

[13] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[14] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[15] Inst Expt Phys, Kosice 04001, Slovakia

[16] Comenius Univ, Bratislava 84248, Slovakia

[17] Joint Inst Nucl Res, RU-141980 Dubna, Russia

[18] Duke Univ, Durham, NC 27708 USA

[19] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[20] Univ Florida, Gainesville, FL 32611 USA

[21] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[22] Univ Geneva, CH-1211 Geneva 4, Switzerland

[23] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[24] Harvard Univ, Cambridge, MA 02138 USA

[25] Univ Illinois, Urbana, IL 61801 USA

[26] Johns Hopkins Univ, Baltimore, MD 21218 USA

[27] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany

[28] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea

[29] Seoul Natl Univ, Seoul 151742, South Korea

[30] Sungkyunkwan Univ, Suwon 440746, South Korea

[31] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea

[32] Chonnam Natl Univ, Kwangju 500757, South Korea

[33] Chonbuk Natl Univ, Jeonju 561756, South Korea

[34] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[35] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[36] UCL, London WC1E 6BT, England

[37] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[38] MIT, Cambridge, MA 02139 USA

[39] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada

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

[41] Univ Toronto, Toronto, ON M5S 1A7, Canada

[42] TRIUMF, Vancouver, BC V6T 2A3, Canada

[43] Univ Michigan, Ann Arbor, MI 48109 USA

[44] Michigan State Univ, E Lansing, MI 48824 USA

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

[46] Univ New Mexico, Albuquerque, NM 87131 USA

[47] Northwestern Univ, Evanston, IL 60208 USA

[48] Ohio State Univ, Columbus, OH 43210 USA

[49] Okayama Univ, Okayama 7008530, Japan

[50] Osaka City Univ, Osaka 588, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 10期

基金：

芬兰科学院; 澳大利亚研究理事会; 瑞士国家科学基金会; 英国科学技术设施理事会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会; 俄罗斯基础研究基金会; 新加坡国家研究基金会;

关键词：

All Open Access; Bronze; Green;

D O I：

10.1103/PhysRevLett.107.102001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The observation of the bottom, strange baryon Xi(0)(b) through the decay chain Xi(0)(b) -> Xi(+)(c)pi(-), where Xi(+)(c) -> Xi(-) pi(+) pi(+), Xi(-) -> Lambda pi(-), and Lambda -> p pi(-), is reported by using data corresponding to an integrated luminosity of 4.2 fb(-1) from p (p) over bar collisions at root s = 1.96 TeV recorded with the Collider Detector at Fermilab. A signal of 25.3(-5.4)(+5.6) candidates is observed whose probability of arising from a background fluctuation is 3.6 x 10(-12), corresponding to 6.8 Gaussian standard deviations. The Xi(0)(b) mass is measured to be 5787.8 +/- 5.0(stat) +/- 1.3(syst) MeV/c(2). In addition, the Xi(-)(b) baryon is observed through the process Xi(-)(b) -> Xi(0)(c)pi(-), where Xi(0)(c) -> Xi(-) pi(+), Xi(-) -> Lambda pi(-), and Lambda -> p pi(-).

引用

页数：7

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