Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector

被引：0

作者：

Aaboud, M. ^{[54
,55
]}

Aad, G. ^{[153
]}

Abbott, B. ^{[183
]}

Abdinov, O. ^{[18
]}

Abeloos, B. ^{[187
]}

Abhayasinghe, D. K. ^{[144
]}

Abidi, S. H. ^{[231
]}

AbouZeid, O. S. ^{[61
]}

Abraham, N. L. ^{[218
]}

Abramowicz, H. ^{[224
]}

Abreu, H. ^{[223
]}

Abulaiti, Y. ^{[8
]}

Acharya, B. S. ^{[100
,101
,260
]}

Adachi, S. ^{[24
]}

Adamczyk, L. ^{[130
]}

Adelman, J. ^{[175
]}

Adersberger, M. ^{[166
]}

Adiguzel, A. ^{[16
,77
,100
,119
,176
,177
,190
,237
,240
,272
]}

Adye, T. ^{[204
]}

Affolder, A. A. ^{[206
]}

Afik, Y. ^{[223
]}

Agheorghiesei, C. ^{[40
]}

Aguilar-Saavedra, J. A. ^{[195
,200
,271
]}

Ahmadov, F. ^{[18
,124
]}

Aielli, G. ^{[115
,116
]}

Akatsuka, S. ^{[133
]}

Akesson, T. P. A. ^{[147
]}

Akilli, E. ^{[78
]}

Akimov, A. V. ^{[162
]}

Alberghi, G. L. ^{[33
]}

Albert, J. ^{[242
]}

Albicocco, P. ^{[74
,75
]}

Verzini, M. J. Alconada ^{[137
,138
]}

Alderweireldt, S. ^{[172
]}

Aleksa, M. ^{[57
]}

Aleksandrov, I. N. ^{[124
]}

Alexa, C. ^{[39
]}

Alexopoulos, T. ^{[12
]}

Alhroob, M. ^{[183
]}

Ali, B. ^{[202
]}

Alimonti, G. ^{[105
]}

Alison, J. ^{[58
]}

Alkire, S. P. ^{[209
]}

Allaire, C. ^{[187
]}

Allbrooke, B. M. M. ^{[218
]}

Allen, B. W. ^{[186
]}

Allport, P. P. ^{[31
]}

Aloisio, A. ^{[107
,108
]}

Alonso, A. ^{[61
]}

Alonso, F. ^{[137
,138
]}

机构：

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

[2] SUNY Albany, Dept Phys, Albany, NY 12222 USA

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

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

[5] Istanbul Aydin Univ, Istanbul, Turkey

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

[7] Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP,IN2P3, Annecy, 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] Natl & Kapodistrian Univ Athens, Phys Dept, Athens, Greece

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

[13] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[14] Bahcesehir Univ, Fac Engn & Nat Sci, Istanbul, Turkey

[15] Istanbul Bilgi Univ, Fac Engn & Nat Sci, Istanbul, Turkey

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

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

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

[19] Barcelona Inst Sci & Technol, IFAE, Barcelona, Spain

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

[21] Tsinghua Univ, Phys Dept, Beijing, Peoples R China

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

[23] UCAS, Beijing, Peoples R China

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

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

[26] Lawrence Berkeley Natl Lab, Phys Div, Berkeley, CA USA

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

[28] Humboldt Univ, Inst Phys, Berlin, Germany

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

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

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

[32] Univ Antonio Narino, Ctr Invest, Bogota, Colombia

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

[34] INFN, Sez Bologna, Bologna, Italy

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

[36] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA

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

[38] Transilvania Univ Brasov, Brasov, Romania

[39] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[40] Alexandru Ioan Cuza Univ, Dept Phys, Iasi, Romania

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

[42] West Univ Timisoara, Timisoara, Romania

[43] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia

[44] Slovak Acad Sci, Inst Expt Phys, Dept Subnucl Phys, Kosice, Slovakia

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

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

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

[48] Univ Cape Town, Dept Phys, Cape Town, South Africa

[49] Univ Johannesburg, Dept Mech Engn Sci, Johannesburg, South Africa

[50] Univ Witwatersrand, Sch Phys, Johannesburg, South Africa

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 04期

基金：

加拿大自然科学与工程研究理事会; 欧盟地平线“2020”; 巴西圣保罗研究基金会;

关键词：

Hadron-Hadron scattering (experiments); Supersymmetry; DARK-MATTER PRODUCTION; SYMMETRY-BREAKING; PLUS PLUS; LHC; SUPERSYMMETRY; VIOLATION; EXTENSION; MODELS; MASSES; DECAY;

D O I：

10.1007/JHEP04(2021)174

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 new phenomena with top quark pairs in final states with one isolated electron or muon, multiple jets, and large missing transverse momentum is performed. Signal regions are designed to search for two-, three-, and four-body decays of the directly pair-produced supersymmetric partner of the top quark (stop). Additional signal regions are designed specifically to search for spin-0 mediators that are produced in association with a pair of top quarks and decay into a pair of dark-matter particles. The search is performed using the Large Hadron Collider proton-proton collision dataset at a centre-of-mass energy of s = 13 TeV recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb(-1). No significant excess above the Standard Model background is observed, and limits at 95% confidence level are set in the stop-neutralino mass plane and as a function of the mediator mass or the dark-matter particle mass. Stops are excluded up to 1200 GeV (710 GeV) in the two-body (three-body) decay scenario. In the four-body scenario stops up to 640 GeV are excluded for a stop-neutralino mass difference of 60 GeV. Scalar and pseudoscalar dark-matter mediators are excluded up to 200 GeV when the coupling strengths of the mediator to Standard Model and dark-matter particles are both equal to one and when the mass of the dark-matter particle is 1 GeV.

引用

页数：66

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Alexopoulos, T.
Alhroob, M.
Ali, B.
Aliev, M.
Alimonti, G.
Alison, J.
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