Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at √s =7 TeV with the ATLAS detector

The ATLAS Collaboration

doi:10.1140/epjc/s10052-012-2056-4

Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at √s =7 TeV with the ATLAS detector

The ATLAS Collaboration

European Organization for Nuclear Research
Fakultät für Mathematik und Physik
University of Freiburg
University of Oklahoma
The Barcelona Institute of Science and Technology
Section de Physique
University of Geneva
University of Oxford
Azerbaijan Academy of Sciences
Oklahoma State University
Department of Physics and Astronomy
Michigan State University
University of Toronto
Tel Aviv University
Laboratoire de l'Accélérateur Linéaire
Sezione INFN di Milano
University of Milano
Sezione di Roma
Abdus Salam International Centre for Theoretical Physics
Agh University of Science and Technology Faculty of Computer Science
Brookhaven National Laboratory Physics Department
Department of Physics
Hampton University
Yale University
Max-Planck-Institut für Physik
Fakultät für Physik
Universität München
School of Physics and Astronomy
Queen Mary University of London
Rutherford Appleton Laboratory
Department of Physics
Brandeis University
Lisboa
Departamento de Fisica Teorica y del Cosmos and CAFPE
University of Granada
Johannes Gutenberg University
Boston University
Departments of Physics & Astronomy and Chemistry
Stony Brook University
Physics Department
University of Texas
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Department of Physics
Bogazici University
Department of Physics
Lund University
International Center for Elementary Particle Physics and Department of Physics
University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Kobe University
State University of New York Albany
Department of Physics
Royal Holloway University of London
Department of Physics and Astronomy
University of Victoria
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
Joint Institute for Nuclear Research, Dubna
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
University Bonn
Department of Physics
Humboldt-Universität zu Berlin
Universite Paris-Saclay

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

72 Citations (Scopus)

Abstract

This letter reports on a search for hypothetical heavy neutrinos, N, and right-handed gauge bosons, W_R, in events with high transverse momentum objects which include two reconstructed leptons and at least one hadronic jet. The results were obtained from data corresponding to an integrated luminosity of 2.1 fb⁻¹collected in proton–proton collisions at √ s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. No excess above the Standard Model background expectation is observed. Excluded mass regions for Majorana and Dirac neutrinos are presented using two approaches for interactions that violate lepton and lepton-flavor numbers. One approach uses an effective operator framework, the other approach is guided by the Left– Right Symmetric Model. The results described in this letter represent the most stringent limits to date on the masses of heavy neutrinos and W_Rbosons obtained in direct searches.

Original language	English
Article number	2056
Journal	European Physical Journal C
Volume	72
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-012-2056-4
Publication status	Published - 3 Jul 2012
Externally published	Yes

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10.1140/epjc/s10052-012-2056-4

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@article{bc9ec9d7990b4de5a21cefdf763dfc6e,

title = "Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at √s =7 TeV with the ATLAS detector",

abstract = "This letter reports on a search for hypothetical heavy neutrinos, N, and right-handed gauge bosons, WR, in events with high transverse momentum objects which include two reconstructed leptons and at least one hadronic jet. The results were obtained from data corresponding to an integrated luminosity of 2.1 fb−1collected in proton{\textendash}proton collisions at √ s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. No excess above the Standard Model background expectation is observed. Excluded mass regions for Majorana and Dirac neutrinos are presented using two approaches for interactions that violate lepton and lepton-flavor numbers. One approach uses an effective operator framework, the other approach is guided by the Left{\textendash} Right Symmetric Model. The results described in this letter represent the most stringent limits to date on the masses of heavy neutrinos and WRbosons obtained in direct searches.",

author = "\{The ATLAS Collaboration\} and G. Aad and B. Abbott and J. Abdallah and Abdelalim, \{A. A.\} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and Zeid, \{O. S.Abou\} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and M. Aderholz and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and A. Akiyama and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and \{De La Taille\}, C. and Sauvan, \{J. B.\} and O. Simard",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ATLAS collaboration 2012.",

year = "2012",

month = jul,

day = "3",

doi = "10.1140/epjc/s10052-012-2056-4",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

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number = "7",

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TY - JOUR

T1 - Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at √s =7 TeV with the ATLAS detector

AU - The ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Zeid, O. S.Abou

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Aderholz, M.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Akiyama, A.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - De La Taille, C.

AU - Sauvan, J. B.

AU - Simard, O.

PY - 2012/7/3

Y1 - 2012/7/3

N2 - This letter reports on a search for hypothetical heavy neutrinos, N, and right-handed gauge bosons, WR, in events with high transverse momentum objects which include two reconstructed leptons and at least one hadronic jet. The results were obtained from data corresponding to an integrated luminosity of 2.1 fb−1collected in proton–proton collisions at √ s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. No excess above the Standard Model background expectation is observed. Excluded mass regions for Majorana and Dirac neutrinos are presented using two approaches for interactions that violate lepton and lepton-flavor numbers. One approach uses an effective operator framework, the other approach is guided by the Left– Right Symmetric Model. The results described in this letter represent the most stringent limits to date on the masses of heavy neutrinos and WRbosons obtained in direct searches.

AB - This letter reports on a search for hypothetical heavy neutrinos, N, and right-handed gauge bosons, WR, in events with high transverse momentum objects which include two reconstructed leptons and at least one hadronic jet. The results were obtained from data corresponding to an integrated luminosity of 2.1 fb−1collected in proton–proton collisions at √ s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. No excess above the Standard Model background expectation is observed. Excluded mass regions for Majorana and Dirac neutrinos are presented using two approaches for interactions that violate lepton and lepton-flavor numbers. One approach uses an effective operator framework, the other approach is guided by the Left– Right Symmetric Model. The results described in this letter represent the most stringent limits to date on the masses of heavy neutrinos and WRbosons obtained in direct searches.

U2 - 10.1140/epjc/s10052-012-2056-4

DO - 10.1140/epjc/s10052-012-2056-4

M3 - Article

AN - SCOPUS:84865600140

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 2056

ER -

Search for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at √s =7 TeV with the ATLAS detector

Abstract

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