The production rate and kinematic distributions of isolated photon pairs produced in hadron interactions are studied. The effects of the initial-state multiple soft-gluon emission to the scattering subprocesses $q\overline{q},qg,$ and $g\overrightarrow{g}\gamma \gamma X$ are resummed with the Collins-Soper-Sterman soft gluon resummation formalism. The effects of fragmentation photons from $q\overrightarrow{g}\gamma q,$ followed by $\overrightarrow{q}\gamma X,$ are also studied. The results are compared with data from the Fermilab Tevatron collider. A prediction of the production rate and kinematic distributions of the diphoton pair in proton-nucleon reactions is also presented.

• Received 26 January 1998

DOI:https://doi.org/10.1103/PhysRevD.57.6934