ar X iv : h ep - p h / 96 06 44 8 v 1 2 6 Ju n 19 96 PSU / TH / 169 DIFFRACTIVE FACTORIZATION - A SIMPLE FIELD THEORY MODEL

Operator definitions of diffractive parton distribution functions are given. A distinction is made between the special case of “Regge factorization” to the general case of “diffractive factorization” with explicit expressions for F diff 2 (βxIP , Q ;xIP , t) in both cases. A calculation from a simple field theory model is presented in the style of “constituent counting rules” for the behavior of the diffractive parton distribution functions when β → 1, which corresponds to when the detected parton carries almost all of the longitudinal momentum transferred from the scattered hadron. A comment is made about the consistency of the model with the observed flattening of n(β) as β → 1, which recently was reported by the H1-collaboration from their preliminary 1994 data. To appear in Proceedings of the International Workshop on Deep-Inelastic Scattering and Related Topics, Rome, Italy 1996, ed. G. D’ Agostini