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

Abstract

This Letter presents a search for high mass e+e−e+e− or μ+μ−μ+μ− resonances in pp collisions at View the MathML sources=7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of ∼40 pb−1∼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′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′Z′ boson is derived, as well as mass limits on Z⁎Z⁎ and E6E6-motivated Z′Z′ models.