Measurement of the W boson polarization in top quark decays with the ATLAS detector

被引：60

作者：

Aad, G. ^{[1
]}

Abbott, B. ^{[147
]}

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

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

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

Abdinov, O. ^{[15
]}

Abi, B. ^{[148
]}

Abolins, M. ^{[121
]}

AbouZeid, O. S. ^{[212
]}

Abramowicz, H. ^{[206
]}

Abreu, H. ^{[185
]}

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

Acharya, B. S. ^{[219
,220
]}

Adamczyk, L. ^{[60
]}

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

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

Adelman, J. ^{[237
]}

Adomeit, S. ^{[132
]}

Adragna, P. ^{[106
]}

Adye, T. ^{[170
]}

Aefsky, S. ^{[34
]}

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

Agustoni, M. ^{[24
,25
]}

Aharrouche, M. ^{[114
]}

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

Ahles, F. ^{[1
]}

Ahmad, A. ^{[200
,201
]}

Ahsan, M. ^{[63
]}

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

Akdogan, T. ^{[27
]}

Akesson, T. P. A. ^{[112
]}

Akimoto, G. ^{[208
,209
]}

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

Akiyama, A. ^{[94
]}

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

Alam, M. A. ^{[107
]}

Albert, J. ^{[230
]}

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

Aleksa, M. ^{[45
]}

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

Alessandria, F. ^{[123
]}

Alexa, C. ^{[40
]}

Alexander, G. ^{[206
]}

Alexandre, G. ^{[71
]}

Alexopoulos, T. ^{[14
]}

Alhroob, M. ^{[219
,221
]}

Aliev, M. ^{[23
]}

Alimonti, G. ^{[123
]}

Alison, J. ^{[158
]}

Allbrooke, B. M. M. ^{[26
]}

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, LAPP, IN2P3, 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, Dipartmento Fis, Bologna, Italy

[31] Ist Nazl Fis Nucl, Sez Bologna, I-40126 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 Juiz de Fora, Juiz de Fora, Brazil

[36] Univ Fed Rio de Janeiro, COPPE, EE, IF, Rio De Janeiro, 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：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 06期

基金：

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

关键词：

Hadron-Hadron Scattering; ANOMALOUS WTB COUPLINGS; COLLISIONS; LHC;

D O I：

10.1007/JHEP06(2012)088

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

This paper presents measurements of the polarization of W bosons in top quark decays, derived from t (t) over bar events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy of 7 TeV were collected with the ATLAS experiment at the LHC and correspond to an integrated luminosity of 1.04 fb(-1). The measured fractions of longitudinally, left-and right-handed polarization are F-0 = 0.67 +/- 0.07, F-L = 0.32 +/- 0.04 and F-R = 0.01 +/- 0.05, in agreement with the Standard Model predictions. As the polarization of the W bosons in top quark decays is sensitive to the Wtb vertex Lorentz structure and couplings, the measurements were used to set limits on anomalous contributions to the Wtb couplings.

引用

页数：46

共 68 条

[1]

Aad G, 2012, J HIGH ENERGY PHYS, DOI 10.1007/JHEP05(2012)059

[2] Electron performance measurements with the ATLAS detector using the 2010 LHC proton-proton collision data [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdelalim, A. A. ;

Abdesselam, A. ;

Abdinov, O. ;

Abi, B. ;

Abolins, M. ;

Abramowicz, H. ;

Abreu, H. ;

Acerbi, E. ;

Acharya, B. S. ;

Adams, D. L. ;

Addy, T. N. ;

Adelman, J. ;

Aderholz, M. ;

Adomeit, S. ;

Adragna, P. ;

Adye, T. ;

Aefsky, S. ;

Aguilar-Saavedra, J. A. ;

Aharrouche, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahsan, M. ;

Aielli, G. ;

Akdogan, T. ;

Akesson, T. P. ;

Akimoto, G. ;

Akimov, A. V. ;

Akiyama, A. ;

Alam, M. S. ;

Alam, M. A. ;

Albert, J. ;

Albrand, S. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alessandria, F. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Aliev, M. ;

Alimonti, G. ;

Alison, J. ;

Aliyev, M. ;

Allport, P. P. ;

Allwood-Spiers, S. E. .

EUROPEAN PHYSICAL JOURNAL C, 2012, 72 (03) :1-46

[3] Observation of a New Xb State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdelalim, A. A. ;

Abdesselam, A. ;

Abdinov, O. ;

Abi, B. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Acerbi, E. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Addy, T. N. ;

Adelman, J. ;

Aderholz, M. ;

Adomeit, S. ;

Adragna, P. ;

Adye, T. ;

Aefsky, S. ;

Aguilar-Saavedra, J. A. ;

Aharrouche, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahsan, M. ;

Aielli, G. ;

Akdogan, T. ;

Akesson, T. P. A. ;

Akimoto, G. ;

Akimov, A. V. ;

Akiyama, A. ;

Alam, M. S. ;

Alam, M. A. ;

Albert, J. ;

Albrand, S. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alessandria, F. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Aliev, M. ;

Alimonti, G. ;

Alison, J. ;

Aliyev, M. .

PHYSICAL REVIEW LETTERS, 2012, 108 (15)

[4]

Aad G, 2011, EUR PHYS J C, V71, DOI 10.1140/epjc/s10052-011-1577-6

[5]

Aad G, 2011, EUR PHYS J C, V71, DOI 10.1140/epjc/s10052-011-1630-5

[6] The ATLAS Simulation Infrastructure [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdelalim, A. A. ;

Abdesselam, A. ;

Abdinov, O. ;

Abi, B. ;

Abolins, M. ;

Abramowicz, H. ;

Abreu, H. ;

Acharya, B. S. ;

Adams, D. L. ;

Addy, T. N. ;

Adelman, J. ;

Adorisio, C. ;

Adragna, P. ;

Adye, T. ;

Aefsky, S. ;

Aguilar-Saavedra, J. A. ;

Aharrouche, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahmed, H. ;

Ahsan, M. ;

Aielli, G. ;

Akdogan, T. ;

Akesson, T. P. ;

Akimoto, G. ;

Akimov, A. V. ;

Aktas, A. ;

Alam, M. S. ;

Alam, M. A. ;

Albrand, S. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Aliev, M. ;

Alimonti, G. ;

Alison, J. ;

Aliyev, M. ;

Allport, P. P. ;

Allwood-Spiers, S. E. ;

Almond, J. ;

Aloisio, A. ;

Alon, R. .

EUROPEAN PHYSICAL JOURNAL C, 2010, 70 (03) :823-874

[7] The ATLAS Experiment at the CERN Large Hadron Collider [J].

Aad, G. ;

Abat, E. ;

Abdallah, J. ;

Abdelalim, A. A. ;

Abdesselam, A. ;

Abdinov, O. ;

Abi, B. A. ;

Abolins, M. ;

Abramowicz, H. ;

Acerbi, E. ;

Acharya, B. S. ;

Achenbach, R. ;

Ackers, M. ;

Adams, D. L. ;

Adamyan, F. ;

Addy, T. N. ;

Aderholz, M. ;

Adorisio, C. ;

Adragna, P. ;

Aharrouche, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahmed, H. ;

Aielli, G. ;

Akesson, P. F. ;

Akesson, T. P. A. ;

Alam, S. M. ;

Albert, J. ;

Albrand, S. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Aleppo, M. ;

Alessandria, F. ;

Alexa, C. ;

Alexander, G. ;

Alexopoulos, T. ;

Alimonti, G. ;

Aliyev, M. ;

Allport, P. P. ;

Allwood-Spiers, S. E. ;

Aloisio, A. ;

Alonso, J. ;

Alves, R. ;

Alviggi, M. G. ;

Amako, K. ;

Amaral, P. ;

Amaral, S. P. ;

Ambrosini, G. ;

Ambrosio, G. .

JOURNAL OF INSTRUMENTATION, 2008, 3 (08)

[8]

Aad G., 2012, EUR PHYS J C

[9]

Aad G., ARXIV12034211 ATLAS

[10]

Aad G., ARXIV11126426 ATLAS

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