Search for type-III seesaw heavy leptons in leptonic final states in pp collisions at √s=13 TeV with the ATLAS detector

被引：0

作者：

Aad, G. ^{[155
]}

Abbott, B. ^{[184
]}

Abbott, D. C. ^{[156
]}

Abud, A. Abed ^{[58
]}

Abeling, K. ^{[79
]}

Abhayasinghe, D. K. ^{[146
]}

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

Abramowicz, H. ^{[227
]}

Abreu, H. ^{[226
]}

Abulaiti, Y. ^{[6
]}

Abusleme Hoffman, A. C. ^{[208
]}

Acharya, B. S. ^{[102
,103
,263
]}

Achkar, B. ^{[79
]}

Adam, L. ^{[153
]}

Bourdarios, C. Adam ^{[5
]}

Adamczyk, L. ^{[132
]}

Adamek, L. ^{[233
]}

Addepalli, S., V ^{[36
]}

Adelman, J. ^{[175
]}

Adiguzel, A. ^{[14
,277
]}

Adorni, S. ^{[80
]}

Adye, T. ^{[205
]}

Affolder, A. A. ^{[207
]}

Afik, Y. ^{[226
]}

Agapopoulou, C. ^{[100
]}

Agaras, M. N. ^{[16
]}

Agarwala, J. ^{[111
,112
]}

Aggarwal, A. ^{[172
]}

Agheorghiesei, C. ^{[39
]}

Aguilar-Saavedra, J. A. ^{[195
,200
,276
]}

Ahmad, A. ^{[58
]}

Ahmadov, F. ^{[126
,274
]}

Ahmed, W. S. ^{[157
]}

Ai, X. ^{[70
,71
]}

Aielli, G. ^{[117
,118
]}

Aizenberg, I ^{[248
]}

Akatsuka, S. ^{[135
]}

Akbiyik, M. ^{[153
]}

Akesson, T. P. A. ^{[149
]}

Akimov, A., V ^{[164
]}

Al Khoury, K. ^{[61
]}

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

Albert, J. ^{[244
]}

Albicocco, P. ^{[76
,77
]}

Alconada Verzini, M. J. ^{[139
,140
]}

Alderweireldt, S. ^{[75
]}

Aleksa, M. ^{[58
]}

Aleksandrov, I. N. ^{[126
]}

Alexa, C. ^{[38
]}

Alexopoulos, T. ^{[10
]}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[37] Transilvania Univ Brasov, Brasov, Romania

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

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

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

[41] Univ Politehn Bucuresti, Bucharest, Romania

[42] West Univ Timisoara, Timisoara, Romania

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

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

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

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

[47] Univ Buenos Aires, CONICET, 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：

EUROPEAN PHYSICAL JOURNAL C | 2022年 / 82卷 / 11期

基金：

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; 欧盟地平线“2020”;

关键词：

D O I：

10.1140/epjc/s10052-022-10785-0

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 the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139 fb(-1) of integrated luminosity recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. The analysis focuses on final states with three or four electrons or muons from the possible decays of new heavy leptons via intermediate electroweak bosons. No significant deviations above the Standard Model expectation are observed; upper and lower limits on the heavy lepton production cross-section and masses are derived respectively. These results are then combined for the first time with the ones already published by ATLAS using the channel with two leptons in the final state. The observed lower limit on the mass of the type-III seesaw heavy leptons combining two, three and four lepton channels together is 910 GeV at the 95% confidence level.

引用

页数：30

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