Search for high mass dilepton resonances in pp collisions at root s=7 TeV with the ATLAS experiment


Aad G., Abbott B., Abdallah J., Abdelalim A. A. , Abdesselam A., Abdinov O., ...More

PHYSICS LETTERS B, vol.700, pp.163-180, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 700
  • Publication Date: 2011
  • Doi Number: 10.1016/j.physletb.2011.04.044
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.163-180
  • Keywords: Grand unified theory, Narrow resonance, New gauge boson, Z ', Dilepton, Mass spectrum, FERMION-PAIR PRODUCTION, PARTON DISTRIBUTIONS, E(+)E(-) COLLISIONS, PHYSICS, CONSTRAINTS, BOSONS, LHC, Z'

Abstract

This Letter presents a search for high mass e(+)e(-) or mu(+)mu(-) resonances in pp collisions at root s = 7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of similar to 40 pb(-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' 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' boson is derived, as well as mass limits on Z* and E-6-motivated Z' models. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.