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Search for high mass dilepton resonances in pp collisions at {radical}(s)=7 TeV with the ATLAS experiment

Abstract

This Letter presents a search for high mass e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} resonances in pp collisions at {radical}(s)=7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of {approx}40 pb{sup -1}. No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of Z{sup '} resonances decaying to dielectrons and dimuons as a function of the resonance mass. A lower mass limit of 1.048 TeV on the Sequential Standard Model Z{sup '} boson is derived, as well as mass limits on Z{sup *} and E{sub 6}-motivated Z{sup '} models.
Authors:
Aad, G; [1]  Abbott, B; [2]  Abdallah, J; [3]  Abdelalim, A A; [4]  Abdesselam, A; [5]  Abdinov, O; [6]  Abi, B; [7]  Abolins, M; [8]  Abramowicz, H; [9]  Abreu, H; [10]  Acerbi, E; [11]  Dipartimento di Fisica, Universita di Milano, Milano (Italy)]; Acharya, B S; [12]  ICTP, Trieste; [13]  Adams, D L; [14]  Addy, T N; [15]  Adelman, J; [16]  Aderholz, M; [17]  Adomeit, S; [18]  Adragna, P; [19]  Adye, T; [20]  Aefsky, S [21] 
  1. Fakultaet fuer Mathematik und Physik, Albert-Ludwigs-Universitaet, Freiburg i.Br. (Germany)
  2. Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK (United States)
  3. Institut de Fisica d'Altes Energies and Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain)
  4. Section de Physique, Universite de Geneve, Geneva (Switzerland)
  5. Department of Physics, Oxford University, Oxford (United Kingdom)
  6. Institute of Physics, Azerbaijan Academy of Sciences, Baku (Azerbaijan)
  7. Department of Physics, Oklahoma State University, Stillwater, OK (United States)
  8. Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States)
  9. Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel)
  10. LAL, Univ. Paris-Sud and CNRS/IN2P3, Orsay (France)
  11. INFN Sezione di Milano (Italy)
  12. INFN Gruppo Collegato di Udine (Italy)
  13. Italy
  14. Physics Department, Brookhaven National Laboratory, Upton, NY (United States)
  15. Department of Physics, Hampton University, Hampton, VA (United States)
  16. Department of Physics, Yale University, New Haven, CT (United States)
  17. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Muenchen (Germany)
  18. Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Muenchen (Germany)
  19. Department of Physics, Queen Mary University of London, London (United Kingdom)
  20. Particle Physics Department, Rutherford Appleton Laboratory, Didcot (United Kingdom)
  21. Department of Physics, Brandeis University, Waltham, MA (United States)
Publication Date:
Jun 13, 2011
Product Type:
Journal Article
Resource Relation:
Journal Name: Physics Letters. Section B; Journal Volume: 700; Journal Issue: 3-4; Other Information: DOI: 10.1016/j.physletb.2011.04.044; PII: S0370-2693(11)00443-6; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BRANCHING RATIO; CERN LHC; CROSS SECTIONS; ELECTRON-POSITRON COLLISIONS; GEV RANGE; LUMINOSITY; MASS; MUONS MINUS; MUONS PLUS; PROTON-PROTON INTERACTIONS; RESONANCE; STANDARD MODEL; TEV RANGE; Z NEUTRAL BOSONS; ACCELERATORS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYON-BARYON INTERACTIONS; BOSONS; COLLISIONS; CYCLIC ACCELERATORS; DIMENSIONLESS NUMBERS; ELECTRON COLLISIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; HADRON-HADRON INTERACTIONS; INTERACTIONS; INTERMEDIATE BOSONS; INTERMEDIATE VECTOR BOSONS; LEPTONS; MATHEMATICAL MODELS; MATTER; MUONS; NUCLEON-NUCLEON INTERACTIONS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE MODELS; PHYSICAL PROPERTIES; POSITRON COLLISIONS; PROTON-NUCLEON INTERACTIONS; QUANTUM FIELD THEORY; STORAGE RINGS; SYNCHROTRONS; UNIFIED GAUGE MODELS
OSTI ID:
21579331
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0370-2693; PYLBAJ; TRN: NL12R7984057246
Availability:
Available from http://dx.doi.org/10.1016/j.physletb.2011.04.044
Submitting Site:
NLN
Size:
page(s) 163-180
Announcement Date:
Aug 09, 2012

Citation Formats

Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S. Search for high mass dilepton resonances in pp collisions at {radical}(s)=7 TeV with the ATLAS experiment. Netherlands: N. p., 2011. Web. doi:10.1016/j.physletb.2011.04.044.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, & Aefsky, S. Search for high mass dilepton resonances in pp collisions at {radical}(s)=7 TeV with the ATLAS experiment. Netherlands. doi:10.1016/j.physletb.2011.04.044.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S. 2011. "Search for high mass dilepton resonances in pp collisions at {radical}(s)=7 TeV with the ATLAS experiment." Netherlands. doi:10.1016/j.physletb.2011.04.044. https://www.osti.gov/servlets/purl/10.1016/j.physletb.2011.04.044.
@misc{etde_21579331,
title = {Search for high mass dilepton resonances in pp collisions at {radical}(s)=7 TeV with the ATLAS experiment}
author = {Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Dipartimento di Fisica, Universita di Milano, Milano (Italy)], Acharya, B S, ICTP, Trieste, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, and Aefsky, S}
abstractNote = {This Letter presents a search for high mass e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} resonances in pp collisions at {radical}(s)=7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of {approx}40 pb{sup -1}. No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of Z{sup '} resonances decaying to dielectrons and dimuons as a function of the resonance mass. A lower mass limit of 1.048 TeV on the Sequential Standard Model Z{sup '} boson is derived, as well as mass limits on Z{sup *} and E{sub 6}-motivated Z{sup '} models.}
doi = {10.1016/j.physletb.2011.04.044}
journal = {Physics Letters. Section B}
issue = {3-4}
volume = {700}
place = {Netherlands}
year = {2011}
month = {Jun}
}