Search for high-mass resonances decaying to lepton pairs with the ATLAS detector

We present a search for high-mass $\ell^{+}\ell^{-}$ 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 5 fb$^{-1}$. 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 2.22 TeV, and a Randall-Sundrum Kaluza-Klein graviton with coupling $k/\overline{M}_{Pl} = 0.1$ is excluded for masses below 2.16 TeV, both at the 95\%~C.L. Results using data recorded by the ATLAS experiment in 2012 at a centre-of-mass energy of 8 TeV will also be presented.