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 pp¯→pγγp¯→pl+l−p¯ are observed, and a measurement of the cross section for Mll>40 GeV/c2 and |ηl|<4 is found to be σ=0.24+0.13−0.10 pb, which is consistent with the standard model prediction.
Search for exclusive Z-boson production and observation of high-mass pp̄→pγγp̄→pl+l-p̄ events in pp̄ collisions at s=1.96TeV
CAUZ, Diego;GIORDANI, Mario;PAULETTA, Giovanni;SANTI, Lorenzo Gianni;
2009-01-01
Abstract
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 pp¯→pγγp¯→pl+l−p¯ are observed, and a measurement of the cross section for Mll>40 GeV/c2 and |ηl|<4 is found to be σ=0.24+0.13−0.10 pb, which is consistent with the standard model prediction.File in questo prodotto:
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