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First Search for Multijet Resonances in sqrt[s]=1.96 TeV pp[over ¯] Collisions

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Aaltonen, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A. et al.
(2011) First Search for Multijet Resonances in sqrt[s]=1.96 TeV pp[over ¯] Collisions. Physical Review Letters, Vol. 107 (No. 4). doi:10.1103/PhysRevLett.107.042001

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.107.042001

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Abstract

We present the first model independent search for three-jet hadronic resonances within multijet events in √s=1.96  TeV pp̅ collisions at the Fermilab Tevatron using the CDF II detector. Pair production of supersymmetric gluinos and squarks with hadronic R-parity violating decays is employed as an example of a new physics benchmark for this signature. Selection criteria based on the kinematic properties of an ensemble of jet combinations within each event help to extract signal from copious QCD background. No significant excess outside the top quark mass window is observed in data with an integrated luminosity of 3.2  fb-1. We place 95% confidence level limits on the production cross section σ(pp̅ →XX′)×BR(g˜g˜→3  jet+3  jet) where X, X′=g˜, q˜, or q̅ ˜, with q˜, q̅ ˜→g˜+jet, as a function of gluino mass, in the range of 77  GeV/c2 to 240  GeV/c2.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 2011
Dates:
DateEvent
2011Published
Volume: Vol. 107
Number: No. 4
DOI: 10.1103/PhysRevLett.107.042001
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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