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
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 a...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51354 https://orcid.org/0000-0002-6047-4211 |
| Summary: | 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. |
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