Searches for new physics in diphoton events in pp[over ¯] collisions at sqrt[s]=1.8 TeV

Abstract

We present a detailed description of a search for anomalous production of missing ${\mathrm{E}}_{\mathrm{T}}$ $({\mathrm{E}\mathrm{/}}_{\mathrm{T}}),$ jets, leptons $(e,\ensuremath{\mu},\ensuremath{\tau}),$ b quarks, or additional photons in events containing two isolated, central $(|\ensuremath{\eta}|<1.0)$ photons with ${\mathrm{E}}_{\mathrm{T}}>12\mathrm{}\mathrm{GeV}.$ The results are consistent with standard model expectations, with the possible exception of one event that has, in addition to the two photons, a central electron, a high-${\mathrm{E}}_{\mathrm{T}}$ electromagnetic cluster, and large ${\mathrm{E}\mathrm{/}}_{\mathrm{T}}.$ We set limits using two specific SUSY scenarios for production of diphoton events with ${\mathrm{E}\mathrm{/}}_{\mathrm{T}}.$