Intrinsic mass scale in QCD factorization

We argue for existence of an intrinsic mass scale in QCD factorization and present a possible origin of it. Values of this scale are within the Non-Perturbative QCD mass range. This scale has nothing to do with the the factorization scales: their values are within the perturbative mass range and dependence on them vanishes in the factorization convolutions. We show that the intrinsic mass scale plays the key part in reduction of K_T Factorization to Collinear Factorization: such a reduction can be done only if dependence of the non-perturbative inputs in K_T Factorization on invariant energy has a sharp-peaked form, so the intrinsic mass scale is associated with location of the peak(s). We also present models where the intrinsic scale is generated by such peaks. (paper)