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We report the results of a search for a narrow resonance in electron-positron events in the invariant mass range of 150-950GeV/c2 using 1.3fb-1 of pp̄ collision data at s=1.96TeV collected by the CDF II detector at Fermilab. No significant evidence of such a resonance is observed and we interpret the results to exclude the standard-model-like Z′ with a mass below 923GeV/c2 and the Randall-Sundrum graviton with a mass below 807GeV/c2 for k/M̄pl=0.1, both at the 95% confidence level. Combining with diphoton data excludes the Randall-Sundrum graviton for masses below 889GeV/c2 for k/M̄pl=0.1. © 2007 The American Physical Society.

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Physical Review Letters