This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at s=1.96TeV, using the CDFII 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)<0.96pb at 95% confidence level. In addition, eight candidate exclusive dilepton events from the process pp̄→pγγp̄ →pl+l-p̄ are observed, and a measurement of the cross section for Mll>40GeV/c2 and |ηl|<4 is found to be σ=0.24-0.10+0.13pb, which is consistent with the standard model prediction. © 2009 The American Physical Society.

Search for exclusive Z-boson production and observation of high-mass pp̄→pγγp̄→pl+l-p̄ events in pp̄ collisions at s=1.96TeV

Piacentino G.;
2009-01-01

Abstract

This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at s=1.96TeV, using the CDFII 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)<0.96pb at 95% confidence level. In addition, eight candidate exclusive dilepton events from the process pp̄→pγγp̄ →pl+l-p̄ are observed, and a measurement of the cross section for Mll>40GeV/c2 and |ηl|<4 is found to be σ=0.24-0.10+0.13pb, which is consistent with the standard model prediction. © 2009 The American Physical Society.
http://oai.aps.org/oai?verb=GetRecord&amp;Identifier=oai:aps.org:PhysRevLett.102.222002&amp;metadataPrefix=oai_apsmeta_2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/88022
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