Evidence for a bottom baryon resonance Λb*0 in CDF data

被引:43
作者
Aaltonen, T. [23 ,24 ]
Amerio, S. [48 ,49 ]
Amidei, D. [40 ]
Anastassov, A. [17 ]
Annovi, A. [19 ]
Antos, J. [13 ,14 ]
Apollinari, G. [17 ]
Appel, J. A. [17 ]
Arisawa, T. [71 ]
Artikov, A. [15 ]
Asaadi, J. [63 ]
Ashmanskas, W. [17 ]
Auerbach, B. [2 ]
Aurisano, A. [63 ]
Azfar, F. [47 ]
Badgett, W. [17 ]
Bae, T. [28 ,29 ,30 ,31 ,32 ,33 ,34 ]
Barbaro-Galtieri, A. [35 ]
Barnes, V. E. [58 ]
Barnett, B. A. [26 ]
da Costa, J. Guimaraes [22 ]
Barria, P. [51 ,53 ]
Bartos, P. [13 ,14 ]
Bauce, M. [48 ,49 ]
Bedeschi, F. [51 ]
Behari, S. [17 ]
Bellettini, G. [51 ,52 ]
Bellinger, J. [73 ]
Benjamin, D. [16 ]
Beretvas, A. [17 ]
Bhatti, A. [60 ]
Bland, K. R. [5 ]
Blumenfeld, B. [26 ]
Bocci, A. [16 ]
Bodek, A. [59 ]
Bortoletto, D. [58 ]
Boudreau, J. [57 ]
Boveia, A. [12 ]
Brigliadori, L. [6 ,7 ]
Bromberg, C. [41 ]
Brucken, E. [23 ,24 ]
Budagov, J. [15 ]
Budd, H. S. [59 ]
Burkett, K. [17 ]
Busetto, G. [48 ,49 ]
Bussey, P. [21 ]
Butti, P. [51 ,52 ]
Buzatu, A. [21 ]
Calamba, A. [11 ]
Camarda, S. [4 ]
机构
[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[2] Argonne Natl Lab, Argonne, IL 60439 USA
[3] Univ Athens, GR-15771 Athens, Greece
[4] Univ Autonoma Barcelona, ICREA, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain
[5] Baylor Univ, Waco, TX 76798 USA
[6] Ist Nazl Fis Nucl, I-40127 Bologna, Italy
[7] Univ Bologna, I-40127 Bologna, Italy
[8] Univ Calif Davis, Davis, CA 95616 USA
[9] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[10] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain
[11] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[12] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[13] Comenius Univ, Bratislava 84248, Slovakia
[14] Inst Expt Phys, Kosice 04001, Slovakia
[15] Joint Inst Nucl Res, RU-141980 Dubna, Russia
[16] Duke Univ, Durham, NC 27708 USA
[17] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[18] Univ Florida, Gainesville, FL 32611 USA
[19] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[20] Univ Geneva, CH-1211 Geneva 4, Switzerland
[21] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[22] Harvard Univ, Cambridge, MA 02138 USA
[23] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland
[24] Helsinki Inst Phys, FIN-00014 Helsinki, Finland
[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] Ewha Womans Univ, Seoul 120750, South Korea
[35] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[36] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England
[37] UCL, London WC1E 6BT, England
[38] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain
[39] MIT, Cambridge, MA 02139 USA
[40] Univ Michigan, Ann Arbor, MI 48109 USA
[41] Michigan State Univ, E Lansing, MI 48824 USA
[42] Inst Theoret & Expt Phys, ITEP, Moscow 117259, Russia
[43] Univ New Mexico, Albuquerque, NM 87131 USA
[44] Ohio State Univ, Columbus, OH 43210 USA
[45] Okayama Univ, Okayama 7008530, Japan
[46] Osaka City Univ, Osaka 5588585, Japan
[47] Univ Oxford, Oxford OX1 3RH, England
[48] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[49] Univ Padua, I-35131 Padua, Italy
[50] Univ Penn, Philadelphia, PA 19104 USA
来源
PHYSICAL REVIEW D | 2013年 / 88卷 / 07期
基金
美国国家科学基金会; 芬兰科学院; 俄罗斯基础研究基金会; 英国科学技术设施理事会; 瑞士国家科学基金会; 加拿大自然科学与工程研究理事会; 新加坡国家研究基金会; 澳大利亚研究理事会;
关键词
HEAVY-QUARK; SPECTRA; MODEL;
D O I
10.1103/PhysRevD.88.071101
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Using data from proton-antiproton collisions at root s = 1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Lambda(b)*(0) pi(-) pi(+) is presented in its Lambda(0)(b) pi(-) pi(+) decay followed by the Lambda(0)(b) -> Lambda(+)(c) pi(-) and Lambda(+)(c) -> pK(-) pi(-) decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6 fb(-1) collected by an online event selection based on charged-particle tracks displaced from the proton-antiproton interaction point. The significance of the observed signal is 3.5 sigma. The mass of the observed state is found to be 5919.22 +/- 0.76 MeV/c(2) in agreement with similar findings in proton-proton collision experiments.
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页数:8
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