ONE-LOOP CORRECTIONS FOR CERTAIN REACTIONS INITIATED BY 5-PARTON SUBPROCESSES VIA HELICITY AMPLITUDES

Using recently obtained one loop amplitudes for five-parton subprocess es via helicity techniques, finite higher order corrections (K factors ) are determined. The contributions of <(q)over bar q>-->gamma gamma g and gq-->gamma gamma q to <(p)over bar p>-->gamma + gamma+X (Fermilab Tevatron) and pp-->gamma+gamma+X (CERN LHC) are considered. From the contributions of six-parton subprocesses those with the sixth parton c ollinear or soft are accounted for; thus the totality of the loop term s and of the six-parton terms involving distributions is taken into ac count. Proper acceptance cuts are introduced. In general, K factors we ll exceed unity.