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

页数：24

共 70 条

[41] Method for simulating electroweak top-quark production events in the NLO approximation: SingleTop event generator [J].