Search for high-mass resonances decaying into ZZ in p$\bar{p}$ collisions at $\sqrt{s}=1.96$\,TeV

TL;DR

This paper reports a search for high-mass resonances decaying into ZZ boson pairs in proton-antiproton collisions at 1.96 TeV, setting upper limits on production cross sections for potential new particles.

Contribution

First search for high-mass ZZ resonances in multiple final states at Tevatron energies, providing new upper limits on Randall-Sundrum graviton production.

Findings

No significant excess observed over the Standard Model background.

Set 95% CL upper limits on cross section times branching ratio for G* between 0.045 and 0.26 pb.

Excluded certain mass ranges for Randall-Sundrum gravitons.

Abstract

We search for high-mass resonances decaying into Z boson pairs using data corresponding to 6 fb^-1 collected by the CDF experiment in p\bar{p} collisions at sqrt{s}=1.96 TeV. The search is performed in three distinct final states: ZZ --> l^+l^-l^+l^-, ZZ --> l^+l^-\nu\nu, and ZZ --> l^+l^-jj. For a Randall-Sundrum graviton G*, the 95% CL upper limits on the production cross section times branching ratio to ZZ, sigma(p\bar{p} --> G^* --> ZZ), vary between 0.26 pb and 0.045 pb in the mass range 300 < M_{G*} < 1000 GeV/c^2.