Search for resonances in the dilepton mass distribution in pp collisions at √ s = 7 TeV

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Search for resonances in the dilepton mass distribution in pp collisions at √ s = 7 TeV

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Chatrchyan2011_Article_SearchForResonancesInTheDilept.pdf

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Published version

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Date Issued

2011

Journal

Journal of High Energy Physics

Publisher

Springer Science and Business Media LLC

Citation

Chatrchyan, S., and C. M. S. Collaboration. "Search for Resonances in the Dilepton Mass Distribution in Pp Collisions at Root S=7 Tev." Journal of High Energy Physics 5 (2011).

Version

Final published version

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 = 7TeV. The event samples correspond to integrated luminosities of 40 pb-1in the dimuon channel and 35 pb-1in 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 1140 GeV, the superstring-inspired Z' ψ below 887 GeV, and, for values of the coupling parameter k√MPl of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV. © SISSA 2011.

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Creative Commons Attribution 4.0 International license

https://creativecommons.org/licenses/by/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/133892

DOI of Published Version

10.1007/JHEP05(2011)093