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Fracture functions from cut vertices

M. Grazzini, L. Trentadue, G. Veneziano

hep-pharXiv:hep-ph/9709452

Abstract

Using a generalized cut vertex expansion we introduce the concept of an extended fracture function for the description of semi-inclusive deep inelastic processes in the target fragmentation region. Extended fracture functions are shown to obey a standard homogeneous DGLAP-type equation which, upon integration over t, becomes the usual inhomogeneous evolution equation for ordinary fracture functions.

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