A search for high-mass resonances decaying to dimuons at CDF

TL;DR

This paper reports a search for high-mass neutral resonances decaying into dimuons in proton-antiproton collisions, setting limits on various theoretical particles without observing a significant excess.

Contribution

It provides the first limits on high-mass resonances in dimuon channels at the Tevatron, constraining models like Z', sneutrinos, and Kaluza-Klein gravitons.

Findings

No significant excess observed in dimuon spectrum

Set 95% CL upper limits on production cross sections

Lower mass bounds established for various new particles

Abstract

We present a search for high-mass neutral resonances using dimuon data corresponding to an integrated luminosity of 2.3 fb$^{-1}$ collected in {$p\bar p$} collisions at {$\sqrt{s}$ = 1.96 TeV} 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 $\sigma \cdot BR (p \bar{p} \to X \to \mu \bar{\mu})$, 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.