Search for Exclusive Z-Boson Production and Observation of High-Mass pp-bar-->p gamma gamma p-bar-->pl+l-p-bar Events in pp-bar Collisions at s=1.96 TeV
Author(s)
Gomez-Ceballos, Guillelmo; Henderson, C.; Choudalakis, Georgios; Knuteson, Bruce O.; Hahn, Kristian Allan; Goncharov, Maxim; Paus, Christoph M. E.; Xie, Si; Makhoul, Khaldoun; Bauer, Gerry P; ... Show more Show less
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This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at √s=1.96 TeV, using the CDF II detector. No exclusive Z→l+l- candidates are observed and the first upper limit on the exclusive Z cross section in hadron collisions is found to be σexcl(Z)<0.96 pb at 95% confidence level. In addition, eight candidate exclusive dilepton events from the process pp̅ →pγγp̅ →pl+l-p̅ are observed, and a measurement of the cross section for Mll>40 GeV/c[superscript 2] and |ηl|<4 is found to be σ=0.24[subscript -0.10] [superscript +0.13] pb, which is consistent with the standard model prediction.
Date issued
2009-06Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Phyisical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for Exclusive Z-Boson Production and Observation of High-Mass pp-bar-->p gamma gamma p-bar-->pl+l-p-bar Events in pp-bar Collisions at s=1.96 TeV.” Physical Review Letters 102.22 (2009): 222002. (C) 2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007