Abstract
It is shown that in processes involving structure functions and/or fragmentation functions initiated by 2→2 parton subprocesses, there is a gauge invariant part that dominates higher order corrections over a sizeable kinematic domain. The gluon Bremsstrahlung contribution to this part arises from collinear and soft gluon configurations. This Bremsstrahlung contribution (and more generally the contribution to this part from 2→3 parton subprocesses) is shown to arise from expressions remarkably simple and general.
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