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

ATLAS Collaboration

doi:10.1140/epjc/s10052-022-10785-0

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

ATLAS Collaboration

iThemba Labs
National Institute of Physics, College of Science, University of the Philippines, Diliman
Department of Physics
University of South Africa
Cadi Ayyad University
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia
NOVA University Lisbon
CERN
Aix-Marseille Université
University of Oklahoma
University of Massachusetts
University of Göttingen
Royal Holloway University of London
United States Department of Energy
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
Pontificia Universidad Católica de Chile
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
Johannes Gutenberg University Mainz
Université Savoie Mont Blanc
AGH University of Science and Technology
University of Toronto
Brandeis University
Northern Illinois University
Bogazici University
Istanbul University
University of Geneva
Rutherford Appleton Laboratory
University of California at Santa Cruz
Université Paris-Saclay
Institute for High Energy Physics
University of Pavia
Radboud University Nijmegen
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
Universidad Autónoma de Madrid
Joint Institute for Nuclear Research
Azerbaijan National Academy of Sciences
McGill University
German Electron Synchrotron
University of Rome Tor Vergata
Weizmann Institute of Science
Kyoto University
Lund University
RAS - P.N. Lebedev Physics Institute
Columbia University
University of Victoria BC
Consejo Nacional de Investigaciones Científicas y Técnicas
University of Edinburgh
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Amsterdam
Czech Technical University in Prague
Academia Sinica - Institute of Physics
Tomsk State University
University of Sussex
University of Birmingham
University of Naples Federico II
University of Washington
Universidad Autónoma de Madrid
Universidade Federal do Rio de Janeiro
University of Oxford
University of Michigan, Ann Arbor
University of Sheffield
University of Texas at Austin
University of Bern
Stockholm University
Oskar Klein Centre
University of Milan
National and Kapodistrian University of Athens
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Oklahoma State University
Lawrence Berkeley National Laboratory
High Energy Accelerator Research Organization, Tsukuba
University of Valencia
Universidade Federal de Juiz de Fora
Duke University
University of Liverpool
University of Montreal
University of Freiburg
University of California at Irvine
Ludwig Maximilian University of Munich
Nagoya University
Ochanomizu University
The University of Tokyo
Harvard University
Uppsala University
Mohamed I University
Comenius University
University of Cape Town
University of Illinois
Humboldt University of Berlin
Shandong University
University of Wuppertal
Nanjing University
TRIUMF
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Carleton University
University of Rome La Sapienza
Simon Fraser University
Yale University
University of Belgrade
University of Texas at Arlington
University of Sydney
Charles University
Cracow
University of Pittsburgh
University of Bonn
University of Melbourne
University of Genoa
University College London
Max Planck Institute for Physics (Werner Heisenberg Institute)
University of Oregon
SLAC National Accelerator Laboratory
University of Science and Technology of China
CAS - Institute of High Energy Physics
Russian Research Centre Kurchatov Institute
Heidelberg University
Lancaster University
Roma Tre University
An-Najah National University
University of Manchester
University of Glasgow
Mohammed V University in Rabat
University of Cambridge
University of Siegen
University of Adelaide
California State University Long Beach
Sorbonne Université
Tufts University
University of Fribourg
University of Warwick
Bahcesehir University
Stony Brook University
Moscow Engineering Physics Institute
University of Hassan II Casablanca
University of Arizona
Technische Universität Dresden
Southern Methodist University
Queen Mary University of London
University of Würzburg
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University of Louisville
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Ohio State University
Shanghai Jiao Tong University
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Justus Liebig University Giessen
Ankara University
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University of Copenhagen
University of Iowa
University of Calabria
University of Johannesburg
Autonomous University of Barcelona
University of Minho
Istanbul Bilgi University
University of Salento
Palacký University Olomouc
Tbilisi State University
Moscow Institute of Physics and Technology
Iowa State University
University of Pennsylvania School of Arts and Sciences
Tsinghua University
Chinese University of Hong Kong
National Tsing Hua University
Sofia University
University of the Witwatersrand
University of Chinese Academy of Sciences
Czech Academy of Sciences
University of Ljubljana
Ben-Gurion University of the Negev
University of Udine
Université Grenoble Alpes
University of Lisbon
University of Naples Parthenope
University of British Columbia
Institute of Particle Physics
New York University
INFN-TIFPA
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Fondazione Bruno Kessler
TU Dortmund University
Universidad de Buenos Aires
York University Toronto
Institute for High Energy Physics
Universidade Federal de São João del-Rei
Universidade de São Paulo
Ibn Tofail University
Demokritos National Centre for Scientific Research
Peter the Great St. Petersburg Polytechnic University
University of Texas at Dallas
University of Coimbra
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California State University Fresno
The University of Chicago
Alikhanov Institute for Theoretical and Experimental Physics
Jagiellonian University in Kraków
University of the Aegean
Lomonosov Moscow State University
Enrico Fermi Center
West University of Timisoara
California State University East Bay
ICREA
University of New Mexico
Osaka University
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Belarus Academy of Sciences
Shinshu University
Tokyo Institute of Technology
Kobe University
University Politehnica of Bucharest
Belarusian State University
Yeditepe University
Ivane Javakhishvili Tbilisi State University
Ilia State University
Universidad de Tarapacá
Waseda University
Kyushu University
University of Innsbruck
Istanbul Aydin University
Universidad Andrés Bello
Hellenic Open University
Peking University
Hong Kong University of Science and Technology
KTH Royal Institute of Technology
California State University Sacramento
Universidad Antonio Nariño
The University of Hong Kong
Transilvania University of Brasov
National Institute for Research and Development of Isotopic and Molecular Technologies
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
Universidad Nacional de Colombia
Louisiana Tech University
TOBB University of Economics and Technology
University of Hamburg
Kyoto University of Education
Wigner Research Centre for Physics
Giresun Universitesi

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

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 139fb-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.

Original language	English
Article number	988
Journal	European Physical Journal C
Volume	82
Issue number	11
DOIs	https://doi.org/10.1140/epjc/s10052-022-10785-0
Publication status	Published - Nov 2022

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-022-10785-0

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@article{c6531de88ab64ebe925fe79a7ba161ee,

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

abstract = "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 139fb-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.",

author = "\{ATLAS Collaboration\} and G. Aad and B. Abbott and Abbott, \{D. C.\} and Abud, \{A. Abed\} and K. Abeling and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and \{Abusleme Hoffman\}, \{A. C.\} and Acharya, \{B. S.\} and B. Achkar and L. Adam and Bourdarios, \{C. Adam\} and L. Adamczyk and L. Adamek and Addepalli, \{S. V.\} and J. Adelman and A. Adiguzel and S. Adorni and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agapopoulou and Agaras, \{M. N.\} and J. Agarwala and A. Aggarwal and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and A. Ahmad and F. Ahmadov and Ahmed, \{W. S.\} and X. Ai and G. Aielli and I. Aizenberg and S. Akatsuka and M. Akbiyik and {\AA}kesson, \{T. P.A.\} and Akimov, \{A. V.\} and \{Al Khoury\}, K. and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and \{Alconada Verzini\}, \{M. J.\} and S. Alderweireldt and M. Aleksa and Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright} 2022, CERN for the benefit of the ATLAS Collaboration.",

year = "2022",

month = nov,

doi = "10.1140/epjc/s10052-022-10785-0",

language = "English",

volume = "82",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "11",

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TY - JOUR

T1 - Search for type-III seesaw heavy leptons in leptonic final states in pp collisions at √s=13TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abbott, D. C.

AU - Abud, A. Abed

AU - Abeling, K.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Abusleme Hoffman, A. C.

AU - Acharya, B. S.

AU - Achkar, B.

AU - Adam, L.

AU - Bourdarios, C. Adam

AU - Adamczyk, L.

AU - Adamek, L.

AU - Addepalli, S. V.

AU - Adelman, J.

AU - Adiguzel, A.

AU - Adorni, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agapopoulou, C.

AU - Agaras, M. N.

AU - Agarwala, J.

AU - Aggarwal, A.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmad, A.

AU - Ahmadov, F.

AU - Ahmed, W. S.

AU - Ai, X.

AU - Aielli, G.

AU - Aizenberg, I.

AU - Akatsuka, S.

AU - Akbiyik, M.

AU - Åkesson, T. P.A.

AU - Akimov, A. V.

AU - Al Khoury, K.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

PY - 2022/11

Y1 - 2022/11

N2 - 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 139fb-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.

AB - 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 139fb-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.

UR - https://www.scopus.com/pages/publications/85141210757

U2 - 10.1140/epjc/s10052-022-10785-0

DO - 10.1140/epjc/s10052-022-10785-0

M3 - Article

AN - SCOPUS:85141210757

SN - 1434-6044

VL - 82

JO - European Physical Journal C

JF - European Physical Journal C

IS - 11

M1 - 988

ER -

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

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