Measurement of the Cross Section for Prompt Isolated Diphoton Production in p (p)over-bar Collisions at root s=1.96 TeV

Abstract

This Letter reports a measurement of the cross section of prompt isolated photon pair production in pp collisions at a total energy ffisffiffi p ¼ 1:96 TeV using data of 5:36 fb1 integrated luminosity collected with the CDF II detector at the Fermilab Tevatron. The measured cross section, differential in basic kinematic variables, is compared with three perturbative QCD predictions, a leading order parton shower calculation and two next-to-leading order calculations.