Publication
Title
Search for resonances in the dilepton mass distribution in pp collisions at $\sqrt{s}$ = 7 TeV
Author
Institution/Organisation
CMS Collaboration
Abstract
 A search for narrow resonances at high mass in the dimuon and dielectron channels has been performed by the CMS experiment at the CERN LHC, using pp collision data recorded at s=7 TeV. The event samples correspond to integrated luminosities of 40 pb−1 in the dimuon channel and 35 pb−1 in the dielectron channel. Heavy dilepton resonances are predicted in theoretical models with extra gauge bosons (Z′) or as Kaluza-Klein graviton excitations (GKK) in the Randall-Sundrum model. Upper limits on the inclusive cross section of Z′(GKK) → ℓ + ℓ − relative to Z → ℓ + ℓ − are presented. These limits exclude at 95% confidence level a Z′ with standard-model-like couplings below 1140GeV, the superstring-inspired Z ψ ′ below 887 GeV, and, for values of the coupling parameter kMPl of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.
Language
English
Source (journal)
Journal of high energy physics. - Bristol
Publication
Bristol : 2011
ISSN
1126-6708
1029-8479 [online]
Volume/pages
5(2011), p. 1-35
Article Reference
093
ISI
000291364500025
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address