Limits on Z-Photon Couplings from p- p¯ Interactions at s=1.8 TeV

Abstract

We report limits on anomalous $\mathrm{ZZ}\ensuremath{\gamma}$ and $Z\ensuremath{\gamma}\ensuremath{\gamma}$ couplings derived from an analysis of $Z+\mathrm{photon}$ production based upon approximately $20{\mathrm{pb}}^{\ensuremath{-}1}$ of the $p\overline{p}$ collision data recorded by the Collider Detector at Fermilab. We observe good agreement with the standard model expectation that all $Z\ensuremath{\gamma}$ couplings are zero. Confidence level intervals for individual couplings and contours for pairs of $\mathrm{CP}$-conserving/violating $\mathrm{ZZ}\ensuremath{\gamma}$ and $Z\ensuremath{\gamma}\ensuremath{\gamma}$ couplings are presented.