Kt-Factorization vs. Renormalization Group: A small-x Consistency Argument

Abstract

The consistency of the BFKL equation with the renormalization group is investigated at next-to-leading log-x level.By use of Kt-factorization, it is found that,besides next-to-leading small-x resummation formulae, a leading, x-dependent redefinition of initial quarks and gluons is needed. Its interpretation and phenomenological relevance are discussed.

Comments: front page,7 pages, 1 figure