Search for new heavy particles decaying to ZZ→llll, lljj in pp̅ collisions at √s=1.96 [square root of s=1.96] TeV
Name
Aaltonen-2011-Search for new heavy.pdf
Size
1.72 MB
Format
Adobe PDF
Checksum (MD5)
82056be0be088aba26c60c83ae14890a
Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Makhoul, Khaldoun
Paus, Christoph M. E.
Bauer, Gerry P
Date Issued
June 2011
Journal
Physical review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al. (CDF Collaboration) "Search for new heavy particles decaying to ZZ→llll, lljj in pp̅ collisions at √s=1.96 TeV" Phys. Rev. D 83, 112008 (2011) © 2011 American Physical Society
Version
Final published version
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 [fb superscript -1] of integrated luminosity in pp̅ collisions at √s=1.96 [square root of 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 [fb superscript -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 [GeV / c superscript 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.83.112008
