Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at √s=13 TeV with the ATLAS detector

被引：1

作者：

Aad, G. ^{[160
]}

Aakvaag, E. ^{[18
]}

Abbott, B. ^{[184
]}

Abdelhameed, S. ^{[179
]}

Abeling, K. ^{[81
]}

Abicht, N. J. ^{[74
]}

Abidi, S. H. ^{[45
]}

Aboelela, M. ^{[67
]}

Aboulhorma, A. ^{[58
]}

Abramowicz, H. ^{[229
]}

Abreu, H. ^{[228
]}

Abulaiti, Y. ^{[181
]}

Acharya, B. S. ^{[106
,107
,254
]}

Ackermann, A. ^{[96
]}

Bourdarios, C. Adam ^{[5
]}

Adamczyk, L. ^{[138
]}

Addepalli, S. V. ^{[35
]}

Addison, M. J. ^{[159
]}

Adelman, J. ^{[178
]}

Adiguzel, A. ^{[27
]}

Adye, T. ^{[203
]}

Affolder, A. A. ^{[205
]}

Afik, Y. ^{[61
]}

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

Agarwala, J. ^{[115
,116
]}

Aggarwal, A. ^{[158
]}

Agheorghiesei, C. ^{[38
]}

Ahmadov, F. ^{[60
,255
]}

Ahmed, W. S. ^{[162
]}

Ahuja, S. ^{[152
]}

Ai, X. ^{[95
]}

Aielli, G. ^{[121
,122
]}

Aikot, A. ^{[244
]}

Tamlihat, M. Ait ^{[58
]}

Aitbenchikh, B. ^{[55
]}

Akbiyik, M. ^{[158
]}

Akesson, T. P. A. ^{[155
]}

Akimov, A. V. ^{[60
]}

Akiyama, D. ^{[249
]}

Akolkar, N. N. ^{[33
]}

Aktas, S. ^{[25
]}

Al Khoury, K. ^{[63
]}

Alberghi, G. L. ^{[32
]}

Albert, J. ^{[246
]}

Albicocco, P. ^{[78
,79
]}

Albouy, G. L. ^{[87
]}

Alderweireldt, S. ^{[77
]}

Alegria, Z. L. ^{[185
]}

Aleksa, M. ^{[60
]}

Aleksandrov, I. N. ^{[60
]}

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, CNRS, IN2P3, APC, Paris, France

[7] Argonne Natl Lab, High Energy Phys Div, 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, Phys Dept, Athens, Greece

[11] Natl Tech Univ Athens, Phys Dept, 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, Phys Dept, Beijing, Peoples R China

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[31] Univ Bologna, Dipartimento Fis & Astron A Righi, Bologna, Italy

[32] INFN Sez Bologna, Bologna, Italy

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

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

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

[36] Transilvania Univ Brasov, Brasov, Romania

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

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

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

[40] Natl Univ Sci & Technol Politech, Bucharest, Romania

[41] West Univ Timisoara, Timisoara, Romania

[42] Univ Bucharest, Fac Phys, Bucharest, 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, Phys Dept, Upton, NY 11973 USA

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

[47] Consejo Nacl Invest Cient & Tecn, Inst Fis Buenos Aires IFIBA, Buenos Aires, DF, Argentina

[48] Calif State Univ Long Beach, Long Beach, CA 90840 USA

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

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

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 11期

基金：

巴西圣保罗研究基金会; 瑞典研究理事会; 加拿大自然科学与工程研究理事会; 日本学术振兴会; 中国国家自然科学基金; 瑞士国家科学基金会; 欧洲研究理事会;

关键词：

PARTON DISTRIBUTIONS; PAIR PRODUCTION; PLUS PLUS; OSCILLATIONS; MATTER;

D O I：

10.1103/PhysRevD.110.112004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the 140 fb(-1) of proton-proton collision data at root s = 13 TeV collected during Run 2. This search targets t (t) over bar production, in which both top quarks decay into a bottom quark and a W boson, where one of the W bosons decays hadronically and the other decays into an electron or muon and a heavy neutral lepton. The heavy neutral lepton is identified through a decay into an electron or muon and another W boson, resulting in a pair of same-charge same-flavor leptons in the final state. This paper presents the first search for heavy neutral leptons in the mass range of 15-75 GeV using t (t) over bar events. No significant excess is observed over the background expectation, and upper limits are placed on the signal cross sections. Assuming a benchmark scenario of the phenomenological type-I seesaw model, these cross section limits are then translated into upper limits on the mixing parameters of the heavy Majorana neutrino with Standard Model neutrinos.

引用

页数：33

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