Search for single top quark production in p(p)over-bar collisions at √s=1.96 TeV in the missing transverse energy plus jets topology

被引:17
作者
Aaltonen, T. [1 ,2 ]
Adelman, J. [17 ]
Alvarez Gonzalez, B. [15 ]
Amerio, S. [55 ,56 ]
Amidei, D. [46 ]
Anastassov, A. [50 ]
Annovi, A. [24 ]
Antos, J. [18 ,19 ]
Apollinari, G. [22 ]
Appel, J. [22 ]
Apresyan, A. [64 ]
Arisawa, T. [75 ]
Artikov, A. [20 ]
Asaadi, J. [70 ]
Ashmanskas, W. [22 ]
Attal, A. [6 ]
Aurisano, A. [70 ]
Azfar, F. [54 ]
Badgett, W. [22 ]
Barbaro-Galtieri, A. [37 ]
Barnes, V. E. [64 ]
Barnett, B. A. [29 ]
Barria, P. [59 ,61 ]
Bartos, P. [18 ,19 ]
Bauer, G. [41 ]
Beauchemin, P. -H. [42 ,43 ,44 ,45 ]
Bedeschi, F. [59 ]
Beecher, D. [39 ]
Behari, S. [29 ]
Bellettini, G. [59 ,60 ]
Bellinger, J. [77 ]
Benjamin, D. [21 ]
Beretvas, A. [22 ]
Bhatti, A. [66 ]
Binkley, M. [22 ]
Bisello, D. [55 ,56 ]
Bizjak, I. [39 ]
Blair, R. E. [3 ,4 ]
Blocker, C. [10 ]
Blumenfeld, B. [29 ]
Bocci, A. [21 ]
Bodek, A. [65 ]
Boisvert, V. [65 ]
Bortoletto, D. [64 ]
Boudreau, J. [63 ]
Boveia, A. [14 ]
Brau, B. [14 ]
Bridgeman, A. [28 ]
Brigliadori, L. [8 ,9 ]
Bromberg, C. [47 ]
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, E-08193 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] Brandeis Univ, Waltham, MA 02254 USA
[11] Univ Calif Davis, Davis, CA 95616 USA
[12] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[13] Univ Calif San Diego, La Jolla, CA 92093 USA
[14] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA
[15] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain
[16] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[17] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[18] Comenius Univ, Bratislava 84248, Slovakia
[19] Inst Expt Phys, Kosice 04001, Slovakia
[20] Joint Inst Nucl Res, RU-141980 Dubna, Russia
[21] Duke Univ, Durham, NC 27708 USA
[22] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[23] Univ Florida, Gainesville, FL 32611 USA
[24] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[25] Univ Geneva, CH-1211 Geneva 4, Switzerland
[26] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[27] Harvard Univ, Cambridge, MA 02138 USA
[28] Univ Illinois, Urbana, IL 61801 USA
[29] Johns Hopkins Univ, Baltimore, MD 21218 USA
[30] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany
[31] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea
[32] Seoul Natl Univ, Seoul 151742, South Korea
[33] Sungkyunkwan Univ, Suwon 440746, South Korea
[34] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea
[35] Chonnam Natl Univ, Kwangju 500757, South Korea
[36] Chonbuk Natl Univ, Jeonju 561756, South Korea
[37] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[38] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England
[39] UCL, London WC1E 6BT, England
[40] Ctr Invest Energet Medioambient & Tecnol, E-28040 Madrid, Spain
[41] MIT, Cambridge, MA 02139 USA
[42] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada
[43] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada
[44] Univ Toronto, Toronto, ON M5S 1A7, Canada
[45] TRIUMF, Vancouver, BC V6T 2A3, Canada
[46] Univ Michigan, Ann Arbor, MI 48109 USA
[47] Michigan State Univ, E Lansing, MI 48824 USA
[48] Inst Theoret & Expt Phys, Moscow 117259, Russia
[49] Univ New Mexico, Albuquerque, NM 87131 USA
[50] Northwestern Univ, Evanston, IL 60208 USA
来源
PHYSICAL REVIEW D | 2010年 / 81卷 / 07期
基金
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; 英国科学技术设施理事会; 芬兰科学院; 俄罗斯基础研究基金会;
关键词
CDF; PERFORMANCE; DETECTOR;
D O I
10.1103/PhysRevD.81.072003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report a search for single top quark production with the CDF II detector using 2: 1 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV. The data selected consist of events characterized by large energy imbalance in the transverse plane and hadronic jets, and no identified electrons and muons, so the sample is enriched in W -> tau nu decays. In order to suppress backgrounds, additional kinematic and topological requirements are imposed through a neural network, and at least one of the jets must be identified as a b quark jet. We measure an excess of signal-like events in agreement with the standard model prediction, but inconsistent with a model without single top quark production by 2.1 standard deviations (sigma), with a median expected sensitivity of 1.4 sigma. Assuming a top quark mass of 175 GeV/c(2) and ascribing the excess to single top quark production, the cross section is measured to be 4.9(-2.2)(+2.5) (stat + syst) pb, consistent with measurements performed in independent data sets and with the standard model prediction.
引用
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页数:24
相关论文
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