This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at root 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 sigma(excl)(Z)< 0.96 pb at 95% confidence level. In addition, eight candidate exclusive dilepton events from the process p(p) over bar -> p gamma gamma (p) over bar -> pl(+)l(-)p over bar are observed, and a measurement of the cross section for M-ll > 40 GeV/c(2) and |eta(l)|< 4 is found to be sigma=(0.24(-0.10)(+0.13)) pb, which is consistent with the standard model prediction.
T., A., J., A., T., A., M., A., B., Á.G., S., A., et al. (2009). Search for Exclusive Z-Boson Production and Observation of High-Mass p(p) over bar -> p gamma gamma p over bar -> pl(+)l(-)p over bar Events in p(p) over bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 102, 222002-1-222002-7.
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Titolo: | Search for Exclusive Z-Boson Production and Observation of High-Mass p(p) over bar -> p gamma gamma p over bar -> pl(+)l(-)p over bar Events in p(p) over bar Collisions at root s=1.96 TeV |
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Citazione: | T., A., J., A., T., A., M., A., B., Á.G., S., A., et al. (2009). Search for Exclusive Z-Boson Production and Observation of High-Mass p(p) over bar -> p gamma gamma p over bar -> pl(+)l(-)p over bar Events in p(p) over bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 102, 222002-1-222002-7. |
Anno: | 2009 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11365/38130