B. I. Ermolaev, M. Greco, S. I. Troyan
Published 2011-12-08, updated 2012-03-09Version 2
We consider the QCD factorization of DIS structure functions at small x and amplitudes of 2->2 -hadronic forward scattering at high energy. We show that both collinear and k_T-factorization for these processes can be obtained approximately as reductions of a more general (totally unintegrated) form of the factorization. The requirement of ultraviolet and infrared stability of the factorization convolutions allows us to obtain restrictions on the fits for the parton distributions in k_T- and collinear factorization.
Comments: 18 pages, 10 figures In the present version misprints found in the prevcious version are corrected and some more details are explained
New look at the QCD factorization
Factorization and infrared properties of non-perturbative contributions to DIS structure functions
Origin of the Q^2-dependence of the DIS structure functions
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