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.

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

CIOCCI, MARIA AGNESE;DONATI, SIMONE;
2009-01-01

Abstract

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.
2009
T., Aaltonen; J., Adelman; T., Akimoto; M., Albrow; B., Álvarez González; S., Amerio; D., Amidei; A., Anastassov; A., Annovi; J., Antos; G., Apollinar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828942
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