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

ATLAS Collaboration

doi:10.1140/epjc/s10052-021-08929-9

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

ATLAS Collaboration

University Politehnica of Bucharest
iThemba Labs
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
University of Toronto
University of Copenhagen
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
Johannes Gutenberg University Mainz
Université Grenoble Alpes
AGH University of Science and Technology
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
Istanbul University
University of Geneva
Rutherford Appleton Laboratory
University of California at Santa Cruz
Université Paris-Saclay
Université Clermont Auvergne
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
McGill University
Lawrence Berkeley National Laboratory
University of Rome Tor Vergata
Kyoto University
Lund University
RAS - P.N. Lebedev Physics Institute
University of Bologna
University of Victoria BC
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 Oregon
University of Birmingham
University of Naples Federico II
Consejo Nacional de Investigaciones Científicas y Técnicas
University of Washington
Universidad Autónoma de Madrid
Universidade Federal do Rio de Janeiro
University of Oxford
Brandeis University
University of Michigan, Ann Arbor
German Electron Synchrotron
Iowa State University
University of Sheffield
University of Texas at Austin
University of Bern
Stockholm University
Oskar Klein Centre
University of Milan
Heidelberg University
National and Kapodistrian University of Athens
Columbia University
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Oklahoma State University
University of California at Irvine
High Energy Accelerator Research Organization, Tsukuba
University of Valencia
Universidade Federal de Juiz de Fora
Duke University
University of Montreal
University of Freiburg
Nagoya University
Ochanomizu University
The University of Tokyo
Tokyo Institute of Technology
Harvard University
Uppsala University
Mohamed I University
Brookhaven National Laboratory
Comenius University
University of Cape Town
University of Illinois
Humboldt University of Berlin
University of Wuppertal
CAS - Institute of High Energy Physics
TRIUMF
Aristotle University of Thessaloniki
University of Rome La Sapienza
Cracow
Simon Fraser University
Yale University
University of Belgrade
University of Texas at Arlington
University of Sydney
Weizmann Institute of Science
University of Pittsburgh
University of Bonn
University of Wisconsin-Madison
University of Louisville
University of Melbourne
University of Genoa
University College London
Max Planck Institute for Physics (Werner Heisenberg Institute)
SLAC National Accelerator Laboratory
University of Science and Technology of China
Russian Research Centre Kurchatov Institute
Lancaster University
An-Najah National University
University of Glasgow
Mohammed V University in Rabat
University of Cambridge
University of Siegen
California State University Long Beach
Sorbonne Université
Tufts University
University of Fribourg
University of Warwick
Gaziantep University
Bahcesehir University
Stony Brook University
Carleton University
Moscow Engineering Physics Institute
University of Hassan II Casablanca
University of Arizona
Technische Universität Dresden
University of Manchester
Southern Methodist University
Queen Mary University of London
University of Würzburg
University of Pisa
University of Alberta
University of Oslo
Institute for High Energy Physics
University of Liverpool
Institute for High Energy Physics
Ohio State University
University of Johannesburg
Shanghai Jiao Tong University
Michigan State University
Universidad Técnica Federico Santa Maria
Slovak Academy of Sciences
University of Bergen
Boston University
Justus Liebig University Giessen
Ankara University
Indiana University Bloomington
Roma Tre University
University of Iowa
University of Calabria
Charles University
University of Edinburgh
Autonomous University of Barcelona
University of Minho
Istanbul Bilgi University
Palacký University Olomouc
Tbilisi State University
Moscow Institute of Physics and Technology
Nanjing University
University of Pennsylvania School of Arts and Sciences
Tsinghua University
Chinese University of Hong Kong
National Tsing Hua 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
University of Lisbon
University of Naples Parthenope
University of British Columbia
Institute of Particle Physics
New York University
Shandong University
TU Dortmund University
Universidad de Buenos Aires
York University Toronto
Pontificia Universidad Católica de Chile
Universidade Federal de São João del-Rei
Universidade de São Paulo
University of Adelaide
Demokritos National Centre for Scientific Research
University of Pavia
Peter the Great St. Petersburg Polytechnic University
University of Texas at Dallas
University of Coimbra
City University of New York
University of Trento
Tokyo Metropolitan University
Nagasaki Institute of Applied Science
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
Centro Studi e Ricerche Enrico
University of Salento
Ibn Tofail University
West University of Timisoara
California State University East Bay
ICREA
University of New Mexico
University of Innsbruck
Osaka University
University of Tsukuba
Belarus Academy of Sciences
Shinshu University
Kobe University
Belarusian State University
Azerbaijan National Academy of Sciences
SUNY Albany
Ivane Javakhishvili Tbilisi State University
Waseda University
Kyushu University
Istanbul Aydin University
Universidad Andrés Bello
Universidad de Tarapacá
Hellenic Open University
Hong Kong University of Science and Technology
The University of Hong Kong
KTH Royal Institute of Technology
Universidad Antonio Nariño
California State University Sacramento
Hiroshima Institute of Technology
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
Bulgarian Academy of Sciences
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

37 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 the final state with two light leptons (electrons or muons) of different flavour and charge combinations, with at least two jets and large missing transverse momentum. No significant excess over the Standard Model expectation is observed. The results are translated into exclusion limits on heavy-lepton masses, and the observed lower limit on the mass of the type-III seesaw heavy leptons is 790 GeV at 95% confidence level.

Original language	English
Article number	218
Journal	European Physical Journal C
Volume	81
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-021-08929-9
Publication status	Published - Mar 2021

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-021-08929-9

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@article{656ad80fa4d64807be65beeb3f44388a,

title = "Search for type-III seesaw heavy leptons in dilepton 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 the final state with two light leptons (electrons or muons) of different flavour and charge combinations, with at least two jets and large missing transverse momentum. No significant excess over the Standard Model expectation is observed. The results are translated into exclusion limits on heavy-lepton masses, and the observed lower limit on the mass of the type-III seesaw heavy leptons is 790 GeV at 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 AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and B. Achkar and L. Adam and Bourdarios, \{C. Adam\} and L. Adamczyk and L. Adamek and J. Adelman and M. Adersberger and A. Adiguzel and S. Adorni and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agapopoulou and Agaras, \{M. N.\} 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 S. Akatsuka and M. Akbiyik and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Khoury, \{K. Al\} and Alberghi, \{G. L.\} and J. Albert and Verzini, \{M. J.Alconada\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright} 2021, CERN for the benefit of the ATLAS collaboration.",

year = "2021",

month = mar,

doi = "10.1140/epjc/s10052-021-08929-9",

language = "English",

volume = "81",

journal = "European Physical Journal C",

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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 - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Achkar, B.

AU - Adam, L.

AU - Bourdarios, C. Adam

AU - Adamczyk, L.

AU - Adamek, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adorni, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agapopoulou, C.

AU - Agaras, M. N.

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 - Akatsuka, S.

AU - Akbiyik, M.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Khoury, K. Al

AU - Alberghi, G. L.

AU - Albert, J.

AU - Verzini, M. J.Alconada

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

PY - 2021/3

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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 the final state with two light leptons (electrons or muons) of different flavour and charge combinations, with at least two jets and large missing transverse momentum. No significant excess over the Standard Model expectation is observed. The results are translated into exclusion limits on heavy-lepton masses, and the observed lower limit on the mass of the type-III seesaw heavy leptons is 790 GeV at 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 the final state with two light leptons (electrons or muons) of different flavour and charge combinations, with at least two jets and large missing transverse momentum. No significant excess over the Standard Model expectation is observed. The results are translated into exclusion limits on heavy-lepton masses, and the observed lower limit on the mass of the type-III seesaw heavy leptons is 790 GeV at 95% confidence level.

UR - https://www.scopus.com/pages/publications/85102179833

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DO - 10.1140/epjc/s10052-021-08929-9

M3 - Article

AN - SCOPUS:85102179833

SN - 1434-6044

VL - 81

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

M1 - 218

ER -

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

Abstract

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