Searches for New Physics in Diphoton Events inpp¯Collisions at√s=1.8TeV

We have searched for anomalous production of missing $E_T\left(E{}_T\right)$, jets, leptons $(e,\mu ,\tau )$, $b\mathrm{quarks}$, or additional photons in events containing two isolated, central $(|\eta |<1.0\mathrm{})$ photons with $E_T>12\mathrm{}\mathrm{GeV}$. 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 $\mathrm{high}-E_T$ electromagnetic cluster, and large $E{}_T$. We set limits using two specific supersymmetry scenarios for production of diphoton events with $E{}_T$.