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We report on a search for anomalous production of Z boson pairs through amassive resonance decay in data corresponding to 2.5-2.9 fb^-1 of integratedluminosity in p pbar collisions at 1.96 TeV using the CDF II detector at theFermilab Tevatron. This analysis, with more data and channels where the Zbosons decay to muons or jets, supersedes the 1.1 fb^-1 four-electron channelresult previously published by CDF. In order to maintain high efficiency formuons, we use a new forward tracking algorithm and muon identificationrequirements optimized for these high signal-to-background channels. Predictingthe dominant backgrounds in each channel entirely from sideband data samples,we observe four-body invariant mass spectra above 300 GeV/c^2 that areconsistent with background. We set limits using the acceptance for a massivegraviton resonance that are 7-20 times stronger than the previously publisheddirect limits on resonant ZZ production.

Search for New Heavy Particles Decaying to Z0 Z0 to llll, lljj in p pbar Collisions at Sqrt(s) = 1.96 TeV