Search for Dilepton Resonances in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>with the ATLAS Detector

This Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. The data were recorded by the ATLAS experiment in $pp$ collisions at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ at the Large Hadron Collider and correspond to a total integrated luminosity of 1.08 $(1.21)\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ in the ${e}^{+}{e}^{\ensuremath{-}}$ (${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$) channel. No statistically significant excess above the standard model expectation is observed and upper limits are set at the 95% C.L. on the cross section times branching fraction of ${Z}^{\ensuremath{'}}$ resonances and Randall-Sundrum gravitons decaying into dileptons as a function of the resonance mass. A lower mass limit of 1.83 TeV on the sequential standard model ${Z}^{\ensuremath{'}}$ boson is set. A Randall-Sundrum graviton with coupling $k/{\overline{M}}_{\mathrm{Pl}}=0.1$ is excluded at 95% C.L. for masses below 1.63 TeV.

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