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We present a search for high-mass neutral resonances using dimuon data corresponding to an integrated luminosity of 2.3fb-1 collected in pp̄ collisions at s=1.96TeV by the CDF II detector at the Fermilab Tevatron. No significant excess above the standard model expectation is observed in the dimuon invariant-mass spectrum. We set 95% confidence level upper limits on σBR(pp̄→X→μμ̄), where X is a boson with spin-0, 1, or 2. Using these cross section limits, we determine lower mass limits on sneutrinos in R-parity-violating supersymmetric models, Z′ bosons, and Kaluza-Klein gravitons in the Randall-Sundrum model. © 2009 The American Physical Society.

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Physical Review Letters