Measurement of the Single-Top-Quark Production Cross Section at CDF

被引:46
作者
Aaltonen, T. [1 ,2 ]
Adelman, J. [17 ]
Akimoto, T. [70 ]
Albrow, M. G. [22 ]
Alvarez Gonzalez, B. [15 ]
Amerio, S. [52 ,53 ]
Amidei, D. [43 ]
Anastassov, A. [47 ]
Annovi, A. [24 ]
Antos, J. [18 ,19 ]
Apollinari, G. [22 ]
Apresyan, A. [61 ]
Arisawa, T. [72 ]
Artikov, A. [20 ]
Ashmanskas, W. [22 ]
Attal, A. [6 ]
Aurisano, A. [67 ]
Azfar, F. [51 ]
Azzurri, P. [56 ,59 ]
Badgett, W. [22 ]
Barbaro-Galtieri, A. [36 ]
Barnes, V. E. [61 ]
Barnett, B. A. [29 ]
Bartsch, V. [38 ]
Bauer, G. [40 ]
Beauchemin, P. -H. [41 ,42 ]
Bedeschi, F. [56 ]
Bednar, P. [18 ,19 ]
Beecher, D. [38 ]
Behari, S. [29 ]
Bellettini, G. [56 ,57 ]
Bellinger, J. [74 ]
Benjamin, D. [21 ]
Beretvas, A. [22 ]
Beringer, J. [36 ]
Bhatti, A. [63 ]
Binkley, M. [22 ]
Bisello, D. [52 ,53 ]
Bizjak, I. [38 ]
Blair, R. E. [4 ]
Blocker, C. [10 ]
Blumenfeld, B. [29 ]
Bocci, A. [21 ]
Bodek, A. [62 ]
Boisvert, V. [62 ]
Bolla, G. [61 ]
Bortoletto, D. [61 ]
Boudreau, J. [60 ]
Boveia, A. [14 ]
Brau, B. [14 ]
机构
[1] Univ Helsinki, Dept Phys, Div High Energy 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 Bologna, 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] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany
[31] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea
[32] Sungkyunkwan Univ, Suwon 440746, South Korea
[33] Seoul Natl Univ, Seoul 151742, South Korea
[34] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea
[35] Chonnam Natl Univ, Kwangju 500757, South Korea
[36] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[37] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England
[38] UCL, London WC1E 6BT, England
[39] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain
[40] MIT, Cambridge, MA 02139 USA
[41] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada
[42] Univ Toronto, Toronto, ON M5S 1A7, Canada
[43] Univ Michigan, Ann Arbor, MI 48109 USA
[44] Michigan State Univ, E Lansing, MI 48824 USA
[45] ITEP, 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
基金
芬兰科学院; 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; 瑞士国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.101.252001
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report a measurement of the single-top-quark production cross section in 2.2 fb(-1) of p (p) over bar collision data collected by the Collider Detector at Fermilab at root s = 1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2(-0.6)(+0.7)(stat + syst) pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value vertical bar V(tb)vertical bar 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit vertical bar V(tb)vertical bar > 0.66 at the 95% C.L.
引用
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页数:8
相关论文
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