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Title
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Search for resonances in the dilepton mass distribution in pp collisions at = 7 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2011
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP05(2011)093
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Volume/pages
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5
(2011)
, p. 1-35
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Article Reference
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093
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ISI
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000291364500025
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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