Search for new physics in photon-lepton events inpp¯collisions ats=1.8 TeV

We present the results of a search in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{}\mathrm{TeV}$ for anomalous production of events containing a photon with large transverse energy and a lepton $(e$ or $\mu )$ with large transverse energy, using $86\hspace{0.5em}{\mathrm{pb}}^{-1}$ of data collected with the Collider Detector at Fermilab during the 1994–1995 collider run at the Fermilab Tevatron. The presence of large missing transverse energy $\left(E_T\right),$ additional photons, or additional leptons in these events is also analyzed. The results are consistent with standard model expectations, with the possible exception of photon-lepton events with large $E_T,$ for which the observed total is 16 events and the expected mean total is $7.6\pm 0.7$ events.