Search for t(t)over-barH/A → t(t)over-bart(t)over-bar production in the multilepton final state in proton-proton collisions at √s=13 TeV with the ATLAS detector

被引：0

作者：

Aad, G. ^{[157
]}

Abbott, B. ^{[178
]}

Abbott, D. C. ^{[158
]}

Abeling, K. ^{[82
]}

Abidi, S. H. ^{[46
]}

Aboulhorma, A. ^{[60
]}

Abramowicz, H. ^{[224
]}

Abreu, H. ^{[223
]}

Abulaiti, Y. ^{[175
]}

Abusleme Hoffman, A. C. ^{[201
]}

Acharya, B. S. ^{[105
,106
,259
]}

Achkar, B. ^{[82
]}

Adam, L. ^{[155
]}

Adam Bourdarios, C. ^{[5
]}

Adamczyk, L. ^{[135
]}

Adamek, L. ^{[229
]}

Addepalli, S. V. ^{[37
]}

Adelman, J. ^{[172
]}

Adiguzel, A. ^{[28
]}

Adorni, S. ^{[83
]}

Adye, T. ^{[198
]}

Affolder, A. A. ^{[200
]}

Afik, Y. ^{[61
]}

Agaras, M. N. ^{[14
]}

Agarwala, J. ^{[114
,115
]}

Aggarwal, A. ^{[155
]}

Agheorghiesei, C. ^{[40
]}

Aguilar-Saavedra, J. A. ^{[193
]}

Ahmad, A. ^{[61
]}

Ahmadov, F. ^{[13
,61
,267
]}

Ahmed, W. S. ^{[159
]}

Ai, X. ^{[73
,74
]}

Aielli, G. ^{[120
,121
]}

Aizenberg, I. ^{[244
]}

Akbiyik, M. ^{[155
]}

Akesson, T. P. A. ^{[152
]}

Akimov, A. V. ^{[61
]}

Al Khoury, K. ^{[64
]}

Alberghi, G. L. ^{[34
]}

Albert, J. ^{[240
]}

Albicocco, P. ^{[79
,80
]}

Alconada Verzini, M. J. ^{[142
,143
]}

Alderweireldt, S. ^{[78
]}

Aleksa, M. ^{[61
]}

Aleksandrov, I. N. ^{[61
]}

Alexa, C. ^{[39
]}

Alexopoulos, T. ^{[11
]}

Alfonsi, A. ^{[170
,171
]}

Alfonsi, F. ^{[34
]}

Alhroob, M. ^{[178
]}

机构：

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

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

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

[4] TOBB Univ Econ & Technol, Div Phys, Ankara, Turkiye

[5] Univ Savoie Mt Blanc, LAPP, CNRS, IN2P3, Annecy, France

[6] Univ Paris Cite, APC, CNRS, IN2P3, Paris, France

[7] Argonne Natl Lab, Div High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA

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

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

[10] Natl & Kapodistrian Univ Athens, Dept Phys, Athens, Greece

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

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

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

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

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

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

[17] Nanjing Univ, Dept Phys, Nanjing, Peoples R China

[18] Univ Chinese Acad Sci UCAS, Beijing, Peoples R China

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

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

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

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

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

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

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

[26] Bogazici Univ, Dept Phys, Istanbul, Turkiye

[27] Gaziantep Univ, Dept Engn Phys, Gaziantep, Turkiye

[28] Istanbul Univ, Dept Phys, Istanbul, Turkiye

[29] Istinye Univ, Istanbul, Turkiye

[30] Univ Antonio Narino, Fac Ciencias, Bogota, Colombia

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

[32] Univ Nacl Colombia, Dept Fis, Bogota, Colombia

[33] Univ Bologna, Dipartimento Fis & Astron A Righi, 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, Dept Phys, Cluj Napoca, Romania

[42] Univ Politehn Bucuresti, Bucharest, Romania

[43] West Univ Timisoara, Timisoara, Romania

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

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

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

[47] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Buenos Aires, DF, Argentina

[48] Univ Buenos Aires, CONICET, Inst Fis Buenos Aires IFIBA, Buenos Aires, DF, Argentina

[49] Calif State Univ Fresno, Fresno, CA 93740 USA

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 07期

基金：

巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会;

关键词：

Beyond Standard Model; Hadron-Hadron Scattering; Top Physics; HIGGS-STRAHLUNG; BROKEN SYMMETRIES; PHYSICS; WEAK;

D O I：

10.1007/JHEP07(2023)203

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 a new heavy scalar or pseudo-scalar Higgs boson (H/A) produced in association with a pair of top quarks, with the Higgs boson decaying into a pair of top quarks (H/A -> t (t) over bar) is reported. The search targets a final state with exactly two leptons with same-sign electric charges or at least three leptons. The analysed dataset corresponds to an integrated luminosity of 139 fb(-1) of proton-proton collisions collected at a centre-of-mass energy of 13TeV with the ATLAS detector at the LHC. Two multivariate classifiers are used to separate the signal from the background. No significant excess of events over the Standard Model expectation is observed. The results are interpreted in the context of a type-II two-Higgs-doublet model. The observed (expected) upper limits at 95% confidence level on the t (t) over barH/A production cross-section times the branching ratio of H/A -> t (t) over bar range between 14 (10) fb and 6 (5) fb for a heavy Higgs boson with mass between 400 GeV and 1000 GeV, respectively. Assuming that only one particle, either the scalar H or the pseudo-scalar A, contributes to the t (t) over bart (t) over bar final state, values of tan beta below 1.2 or 0.5 are excluded for a mass of 400 GeV or 1000 GeV, respectively. These exclusion ranges increase to tan beta below 1.6 or 0.6 when both particles are considered.

引用

页数：53

共 111 条

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Achkar, B. ;

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Bourdarios, C. Adam ;

Adamczyk, L. ;

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JOURNAL OF INSTRUMENTATION, 2020, 15 (09)

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