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Search for new heavy particles decaying to ZZ→llll, lljj in pp[over ¯] collisions at sqrt[s]=1.96 TeV
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(2011) Search for new heavy particles decaying to ZZ→llll, lljj in pp[over ¯] collisions at sqrt[s]=1.96 TeV. Physical Review D, Vol. 83 (no. 11). doi:10.1103/PhysRevD.83.112008 ISSN 1550-7998.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.83.112008
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 pp̅ collisions at √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/c2 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.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review D | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1550-7998 | ||||
Official Date: | 2011 | ||||
Dates: |
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Volume: | Vol. 83 | ||||
Number: | no. 11 | ||||
DOI: | 10.1103/PhysRevD.83.112008 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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