Measurement of the t-channel single top-quark production cross section in pp collisions at √s=7 TeV with the ATLAS detector

被引：138

作者：

Aad, G. ^{[1
]}

Abbott, B. ^{[147
]}

Abdallah, J. ^{[16
,17
,18
]}

Khalek, S. Abdel ^{[151
,152
]}

Abdelalim, A. A. ^{[71
]}

Abdesselam, A. ^{[155
]}

Abdinov, O. ^{[15
]}

Abi, B. ^{[148
]}

Abolins, M. ^{[121
]}

AbouZeid, O. S. ^{[210
]}

Abramowicz, H. ^{[204
]}

Abreu, H. ^{[151
,152
]}

Acerbi, E. ^{[122
,123
]}

Acharya, B. S. ^{[217
,218
]}

Adamczyk, L. ^{[60
]}

Adams, D. L. ^{[39
]}

Addy, T. N. ^{[82
]}

Adelman, J. ^{[234
]}

Aderholz, M. ^{[133
]}

Adomeit, S. ^{[132
]}

Adragna, P. ^{[105
]}

Adye, T. ^{[170
]}

Aefsky, S. ^{[34
]}

Aguilar-Saavedra, J. A. ^{[163
,164
,165
]}

Aharrouche, M. ^{[113
]}

Ahlen, S. P. ^{[33
]}

Ahles, F. ^{[1
]}

Ahmad, A. ^{[199
,200
]}

Ahsan, M. ^{[63
]}

Aielli, G. ^{[175
,176
]}

Akdogan, T. ^{[27
]}

Akesson, T. P. A. ^{[111
]}

Akimoto, G. ^{[206
,207
]}

Akimov, A. V. ^{[128
]}

Akiyama, A. ^{[94
]}

Alam, M. S. ^{[2
]}

Alam, M. A. ^{[106
]}

Albert, J. ^{[228
]}

Albrand, S. ^{[79
,80
,81
]}

Aleksa, M. ^{[45
]}

Aleksandrov, I. N. ^{[92
]}

Alessandria, F. ^{[122
]}

Alexa, C. ^{[40
]}

Alexander, G. ^{[204
]}

Alexandre, G. ^{[71
]}

Alexopoulos, T. ^{[14
]}

Alhroob, M. ^{[32
]}

Aliev, M. ^{[23
]}

Alimonti, G. ^{[122
]}

Alison, J. ^{[158
]}

机构：

[1] Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany

[2] SUNY Albany, Albany, NY 12222 USA

[3] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[4] Ankara Univ, Dept Phys, TR-06100 Ankara, Turkey

[5] Gazi Univ, Dept Phys, Ankara, Turkey

[6] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkey

[7] Turkish Atom Energy Commiss, Ankara, Turkey

[8] CNRS IN2P3, LAPP, Annecy Le Vieux, France

[9] Univ Savoie, Annecy Le Vieux, France

[10] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[11] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[12] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

[13] Univ Athens, Dept Phys, Athens, Greece

[14] Natl Tech Univ Athens, Dept Phys, Zografos, Greece

[15] Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan

[16] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[17] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain

[18] ICREA, Barcelona, Spain

[19] Univ Belgrade, Inst Phys, Belgrade, Serbia

[20] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade, Serbia

[21] Univ Bergen, Dept Phys & Technol, Bergen, Norway

[22] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA

[23] Humboldt Univ, Dept Phys, Berlin, Germany

[24] Univ Bern, Albert Einstein Ctr Fundamental Phys, Bern, Switzerland

[25] Univ Bern, High Energy Phys Lab, Bern, Switzerland

[26] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[27] Bogazici Univ, Dept Phys, Istanbul, Turkey

[28] Dogus Univ, Div Phys, Istanbul, Turkey

[29] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkey

[30] Univ Bologna, Dipartimento Fis, Bologna, Italy

[31] Univ Bologna, INFN Sez Bologna, Bologna, Italy

[32] Univ Bonn, Inst Phys, Bonn, Germany

[33] Boston Univ, Dept Phys, Boston, MA 02215 USA

[34] Brandeis Univ, Dept Phys, Waltham, MA 02254 USA

[35] Univ Fed Rio De Janeiro COPPE EE IF, Rio De Janeiro, Brazil

[36] Fed Univ Juiz de Fora UFJF, Juiz De Fora, Brazil

[37] Fed Univ Sao Joao del Rei UFSJ, Sao Joao Del Rei, Brazil

[38] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil

[39] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[40] Natl Inst Phys & Nucl Engn, Bucharest, Romania

[41] Univ Politehn Bucuresti, Bucharest, Romania

[42] Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina

[43] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[44] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada

[45] CERN, Geneva, Switzerland

[46] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[47] Pontificia Univ Catolica Chile, Dept Fis, Santiago, Chile

[48] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[49] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[50] Univ Sci & Technol China, Dept Modern Phys, Hefei, Anhui, Peoples R China

来源：

PHYSICS LETTERS B | 2012年 / 717卷 / 4-5期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/j.physletb.2012.09.031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb(-1) of pp collision data at root s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding sigma(t) = 83 +/- 4 (stat.)(-19)(+20) (syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation vertical bar V-tb vertical bar >> vertical bar V-ts vertical bar, vertical bar V-td vertical bar, the coupling strength at the W-t-b vertex is determined to be vertical bar V-tb vertical bar = 1.13(-0.13)(+0.14). If it is assumed that vertical bar V-tb vertical bar <= 1 a lower limit of vertical bar V-tb vertical bar > 0.75 is obtained at the 95% confidence level. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：330 / 350

页数：21

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