AN EFFECTIVE FIELD THEORY LOOK AT DEEP INELASTIC SCATTERING
Abstract
This talk discusses the effective field theory view of deep inelastic scattering. In such an approach, the standard factorization formula of a hard coefficient multiplied by a parton distribution function arises from matching of QCD onto an effective field theory. The DGLAP equations can then be viewed as the standard renormalization group equations that determines the cutoff dependence of the nonlocal operator whose forward matrix element is the parton distribution function. As an example, the non-singlet quark splitting function is derived directly from the renormalization properties of the nonlocal operator itself. This approach, although discussed in the literature, does not appear to be well known to the larger high energy community. In this talk we give a pedagogical introduction to this subject.
