We report on a search for anomalous production of Z boson pairs through a massive resonance decay in data corresponding to 2: 5-2: 9 fb(-1) of integrated luminosity in p (p) over bar - collisions at root s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron. This analysis, with more data and channels where the Z bosons decay to muons or jets, supersedes the 1: 1 fb(-1) four-electron channel result previously published by CDF. In order to maintain high efficiency for muons, we use a new forward tracking algorithm and muon identification requirements optimized for these high signal-to-background channels. Predicting the dominant backgrounds in each channel entirely from sideband data samples, we observe four-body invariant mass spectra above 300 GeV/c(2) that are consistent with background. We set limits using the acceptance for a massive graviton resonance that are 7-20 times stronger than the previously published direct limits on resonant ZZ diboson production.

Search for new heavy particles decaying to ZZ -> llll, lljj in p(p)over bar collisions at root s = 1.96 TeV / T., A., B. A., G., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. E., B., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 83:(2011), p. 112008. [10.1103/physrevd.83.112008]

Search for new heavy particles decaying to ZZ -> llll, lljj in p(p)over bar collisions at root s = 1.96 TeV

S. D. Cecco;GIAGU, Stefano;IORI, Maurizio;MARGAROLI, Fabrizio;
2011

Abstract

We report on a search for anomalous production of Z boson pairs through a massive resonance decay in data corresponding to 2: 5-2: 9 fb(-1) of integrated luminosity in p (p) over bar - collisions at root s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron. This analysis, with more data and channels where the Z bosons decay to muons or jets, supersedes the 1: 1 fb(-1) four-electron channel result previously published by CDF. In order to maintain high efficiency for muons, we use a new forward tracking algorithm and muon identification requirements optimized for these high signal-to-background channels. Predicting the dominant backgrounds in each channel entirely from sideband data samples, we observe four-body invariant mass spectra above 300 GeV/c(2) that are consistent with background. We set limits using the acceptance for a massive graviton resonance that are 7-20 times stronger than the previously published direct limits on resonant ZZ diboson production.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Search for new heavy particles decaying to ZZ -> llll, lljj in p(p)over bar collisions at root s = 1.96 TeV / T., A., B. A., G., S., A., D., A., A., A., A., A., J., A., G., A., J. A., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. E., B., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 83:(2011), p. 112008. [10.1103/physrevd.83.112008]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/491970
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