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

[摘要] This Letter presents a search for high mass e[superscript +]e[superscript −] or μ[superscript +]μ[superscript −] resonances in pp collisions at √s = 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[superscript −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′ boson is derived, as well as mass limits on Z* and E[subscript 6]-motivated Z′ models.

[发布机构] Elsevier