Search for the production of ZW and ZZ boson pairs decaying into charged leptons and jets in p[bar over p] collisions at √s = 1.96 TeV
Name
Aaltonen-2013-Search for the production.pdf
Size
1.74 MB
Format
Adobe PDF
Checksum (MD5)
9fba453967c5da740ab08c0cb2bb7f7c
Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
November 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Search for the production of ZW and ZZ boson pairs decaying into charged leptons and jets in p[bar over p] collisions at √s = 1.96 TeV.” Physical Review D 88, no. 9 (November 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antiproton collisions recorded with the CDF II detector at the Tevatron, corresponding to 8.9 fb[superscript −1] of integrated luminosity. We increase the sensitivity to vector-boson decays into pairs of quarks using a neural-network discriminant that exploits the differences between the spatial spread of energy depositions and charged-particle momenta contained within the jet of particles originating from quarks and gluons. Additionally, we employ new jet energy corrections to Monte Carlo simulations that account for differences in the observed energy scales for quark and gluon jets. The number of signal events is extracted through a simultaneous fit to the dijet mass spectrum in three classes of events: events likely to contain jets with a heavy-quark decay, events likely to contain jets originating from light quarks, and events that fail these identification criteria. We determine the production cross section to be σ[subscript ZW+ZZ] = 2.5[+2.0 over −1.0] pb (<6.1 pb at the 95% confidence level), consistent with the standard model prediction of 5.1 pb.
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.88.092002
