On the QCD dipole content of hard photon and gluon probes

Abstract

A gluon forward jet playing the role of a deep probe in high energy scattering, we analyze its infinite momentum QCD wave function in terms of dipole (color-singlet quark-antiquark) configurations using k_T-factorization properties. The comparison is made with virtual photon quark-antiquark configurations. Some implications for hard processes with forward jets at Hera and Tevatron are suggested.

Comments: Invited talk at the QCD Euroconference 99,Montpellier July 7-13, 1999; 5pages, 1 eps figure