Search for Exclusive Z-Boson Production and Observation of High-Mass pp¯→pγγp¯→pl+l-p¯ Events in pp¯ Collisions at s=1.96 TeV Academic Article uri icon

abstract

  • This Letter presents a search for exclusive Z boson production in proton-antiproton collisions at sqrt[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 pp[over ]-->pgammagammap[over ]-->pl;{+}l;{-}p[over ] 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.

author list (cited authors)

  • Aaltonen, T., Adelman, J., Akimoto, T., Albrow, M. G., González, B., Amerio, S., ... Zucchelli, S.

citation count

  • 56

publication date

  • June 2009