Search for resonant production of t(t)over-bar pairs in 4.8 fb-1 of integrated luminosity of p(p)over-bar collisions at √s=1.96 TeV

被引:22
作者
Aaltonen, T. [1 ,24 ]
Alvarez Gonzalez, B. [11 ]
Amerio, S. [51 ]
Amidei, D. [43 ]
Anastassov, A. [18 ]
Annovi, A. [20 ]
Antos, J. [14 ,15 ]
Apollinari, G. [18 ]
Appel, J. A. [18 ]
Arisawa, T. [71 ]
Artikov, A. [16 ]
Asaadi, J. [65 ]
Ashmanskas, W. [18 ]
Auerbach, B. [74 ]
Aurisano, A. [65 ]
Azfar, F. [50 ]
Badgett, W. [18 ]
Bae, T. [28 ,29 ,30 ,31 ,32 ,33 ]
Barbaro-Galtieri, A. [34 ]
Barnes, V. E. [59 ]
Barnett, B. A. [26 ]
Barria, P. [54 ,56 ]
Bartos, P. [14 ,15 ]
Bauce, M. [51 ,52 ]
Bedeschi, F. [54 ]
Beecher, D. [36 ]
Behari, S. [26 ]
Bellettini, G. [54 ,55 ]
Bellinger, J. [73 ]
Benjamin, D. [17 ]
Beretvas, A. [18 ]
Bhatti, A. [61 ]
Binkley, M. [18 ]
Bisello, D. [51 ,52 ]
Bizjak, I. [36 ]
Bland, K. R. [6 ]
Blumenfeld, B. [26 ]
Bocci, A. [17 ]
Bodek, A. [60 ]
Bortoletto, D. [59 ]
Boudreau, J. [58 ]
Boveia, A. [13 ]
Brigliadori, L. [7 ,8 ]
Bromberg, C. [44 ]
Brucken, E. [1 ,24 ]
Budagov, J. [16 ]
Budd, H. S. [60 ]
Burkett, K. [18 ]
Busetto, G. [51 ,52 ]
Bussey, P. [22 ]
机构
[1] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland
[2] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[3] Argonne Natl Lab, Argonne, IL 60439 USA
[4] Univ Athens, GR-15771 Athens, Greece
[5] Univ Autonoma Barcelona, ICREA, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain
[6] Baylor Univ, Waco, TX 76798 USA
[7] Ist Nazl Fis Nucl, I-40127 Bologna, Italy
[8] Univ Bologna, I-40127 Bologna, Italy
[9] Univ Calif Davis, Davis, CA 95616 USA
[10] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[11] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain
[12] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[13] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[14] Comenius Univ, Bratislava 84248, Slovakia
[15] Inst Expt Phys, Kosice 04001, Slovakia
[16] Joint Inst Nucl Res, RU-141980 Dubna, Russia
[17] Duke Univ, Durham, NC 27708 USA
[18] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[19] Univ Florida, Gainesville, FL 32611 USA
[20] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[21] Univ Geneva, CH-1211 Geneva 4, Switzerland
[22] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[23] Harvard Univ, Cambridge, MA 02138 USA
[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] 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] Ohio State Univ, Columbus, OH 43210 USA
[48] Okayama Univ, Okayama 7008530, Japan
[49] Osaka City Univ, Osaka 588, Japan
[50] Univ Oxford, Oxford OX1 3RH, England
来源
PHYSICAL REVIEW D | 2011年 / 84卷 / 07期
基金
澳大利亚研究理事会; 英国科学技术设施理事会; 美国国家科学基金会; 新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 瑞士国家科学基金会; 俄罗斯基础研究基金会; 芬兰科学院;
关键词
CDF; HIERARCHY; DETECTOR; MASS;
D O I
10.1103/PhysRevD.84.072004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We search for resonant production of t (t) over bar pairs in 4.8 fb(-1) integrated luminosity of p (p) over bar collision data at root s = 1.96 TeV in the lepton + jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each event a probability density function of the t (t) over bar candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant t (t) over bar production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of t (t) over bar pairs. A benchmark model of leptophobic Z' -> t (t) over bar is excluded with m(Z') < 900 GeV/c(2) at 95% confidence level.
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页数:8
相关论文
共 31 条
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