Search for high-mass dilepton resonances with the ATLAS experiment at sqrt(s) = 7 TeV

Abstract

We present a search for high-mass l+l- resonances in pp collisions at a centre-of-mass energy of 7 TeV recorded by the ATLAS experiment in 2011. No statistically significant excess above the Standard Model expectation is observed in a dataset corresponding to an integrated luminosity of approximately 1/fb. Consequently, upper limits are set on the cross-section times branching ratio of resonances decaying to muon pairs as a function of the resonance mass. In particular, a Sequential Standard Model Z' is excluded for masses below 1.83 TeV, and a Randall-Sundrum Kaluza-Klein graviton with coupling k/M_Pl = 0.1 is excluded for masses below 1.63 TeV, both at the 95% C.L.Comment: 3 pages, 3 figures, 2 tables, XXXI Physics In Collision Proceeding