Search for Resonances in the Dilepton Mass Distribution in $pp$ Collisions at $$\sqrt{s} = 7$$ TeV

Journal Article · Tue Mar 01 04:00:00 EST 2011 · JHEP

DOI:https://doi.org/10.1007/JHEP05(2011)093· OSTI ID:1847333

Chatrchyan, Serguei

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 sqrt(s)=7 TeV. The event samples correspond to integrated luminosities of 40 inverse picobarns in the dimuon channel and 35 inverse picobarns in the dielectron channel. Heavy dilepton resonances are predicted in theoretical models with extra gauge bosons (Z') or as Kaluza-Klein graviton excitations(G_KK) in the Randall-Sundrum model. Upper limits on the inclusive cross section of Z'(G_KK) decaying to oppositely charged leptons relative to Z decaying to oppositely charged leptons are presented. These limits exclude at 95% confidence level a Z' with standard-model-like couplings below 1140 GeV, the superstring-inspired Z_psi below 887 GeV, and, for values of the coupling parameter k/M_Pl of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: CMS
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1847333
• Report Number(s): CERN-PH-EP-2011-002; CMS-EXO-10-013; FERMILAB-PUB-11-757-CMS; arXiv:1103.0981; oai:inspirehep.net:891470
• Journal Information: JHEP, Journal Name: JHEP Vol. 05
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS