Search for single production of vector-like quarks decaying into Wb in pp collisions at √s=8 TeV with the ATLAS detector

被引：0

作者：

Aad, G. ^{[116
,117
]}

Abbott, B. ^{[147
]}

Abdallah, J. ^{[211
]}

Abdinov, O. ^{[13
]}

Abeloos, B. ^{[151
]}

Aben, R. ^{[140
,141
]}

Abolins, M.

AbouZeid, O. S. ^{[218
]}

Abramowicz, H. ^{[213
]}

Abreu, H. ^{[212
]}

Abreu, R. ^{[150
]}

Abulaiti, Y. ^{[204
,205
]}

Acharya, B. S. ^{[226
,227
,228
,246
]}

Adamczyk, L. ^{[58
]}

Adams, D. L. ^{[35
]}

Adelman, J. ^{[142
]}

Adomeit, S. ^{[131
]}

Adye, T. ^{[178
]}

Affolder, A. A. ^{[103
,242
]}

Agatonovic-Jovin, T. ^{[15
]}

Agricola, J. ^{[78
]}

Aguilar-Saavedra, J. A. ^{[162
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Ahlen, S. P. ^{[29
]}

Ahmadov, F. ^{[92
,247
]}

Aielli, G.

Akerstedt, H. ^{[204
,205
]}

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

Akimov, A. V. ^{[127
]}

Alberghi, G. L. ^{[26
,27
]}

Albert, J. ^{[237
]}

Albrand, S. ^{[79
]}

Verzini, M. J. Alconada ^{[98
,99
]}

Aleksa, M. ^{[41
]}

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

Alexa, C. ^{[36
]}

Alexander, G. ^{[213
]}

Alexopoulos, T. ^{[12
]}

Alhroob, M. ^{[147
]}

Alimonti, G. ^{[122
]}

Alio, L. ^{[116
,117
]}

Alison, J.

Alkire, S. P. ^{[54
]}

Allbrooke, B. M. M. ^{[209
]}

Allen, B. W. ^{[150
]}

Allport, P. P. ^{[22
]}

Aloisio, A. ^{[8
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Alonso, A. ^{[41
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Alonso, F. ^{[98
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Alpigiani, C. ^{[193
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Gonzalez, B. Alvarez ^{[41
]}

机构：

[1] Univ Adelaide, Dept Phys, Adelaide, SA, Australia

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

[3] Ankara Univ, Dept Phys, Ankara, Turkey

[4] Istanbul Aydin Univ, Istanbul, Turkey

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

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

[7] Univ Savoie Mt Blanc, Annecy Le Vieux, France

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

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

[10] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA

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

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

[13] Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan

[14] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Barcelona, Spain

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

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

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

[18] Univ Calif Berkeley, Berkeley, CA 94720 USA

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

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

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

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

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

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

[25] Dogus Univ, Dept Phys, Istanbul, Turkey

[26] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy

[27] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy

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

[29] Boston Univ, Dept Phys, Boston, MA USA

[30] Brandeis Univ, Dept Phys, Waltham, MA USA

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

[32] Fed Univ Juiz de Fora UFJF, Elect Circuits Dept, Juiz De Fora, Brazil

[33] Fed Univ Sao Joao Del Rei UFSJ, Sao Joao Del Rei, Brazil

[34] Univ Sao Paulo, Inst Fis, Sao Paulo, Brazil

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

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

[37] Natl Inst Res & Dev Isotop & Mol Technol, Dept Phys, Cluj Napoca, Romania

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

[39] Univ Cambridge, Cavendish Lab, Cambridge, England

[40] Carleton Univ, Dept Phys, Ottawa, ON, Canada

[41] CERN, Geneva, Switzerland

[42] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA

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

[44] Univ Tecn Federico Santa Maria, Dept F sica, Valparaiso, Chile

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

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

[47] Nanjing Univ, Dept Phys, Nanjing, Jiangsu, Peoples R China

[48] Shandong Univ, Sch Phys, Jinan, Shandong, Peoples R China

[49] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, PKU CHEP, Shanghai, Peoples R China

[50] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 08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：

COMPOSITE HIGGS; PARTON DISTRIBUTIONS; BREAKING;

D O I：

10.1140/epjc/s10052-016-4281-8

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：

A search for singly produced vector-like Q quarks, where Q can be either a T quark with charge +2/3 or a Y quark with charge -4/3, is performed in proton-proton collisions recorded with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 20.3 fb(-1) and was produced with a centre-of-mass energy of root s = 8 TeV. This analysis targets Q -> Wb decays where the W boson decays leptonically. A veto on massive large-radius jets is used to reject the dominant t (t) over bar background. The reconstructed Q-candidate mass, ranging from 0.4 to 1.2 TeV, is used in the search to discriminate signal from background processes. No significant deviation from the Standard Model expectation is observed, and limits are set on the Q -> Wb cross-section times branching ratio. The results are also interpreted as limits on the QWb coupling and the mixing with the Standard Model sector for a singlet T quark or a Y quark from a doublet. T quarks with masses below 0.95 TeV are excluded at 95 % confidence level, assuming a unit coupling and a BR(T -> Wb) = 0.5, whereas the expected limit is 1.10 TeV.

引用

页数：26

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