Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-06-14
Phys.Rev. D55 (1997) 5414-5428
Physics
High Energy Physics
High Energy Physics - Phenomenology
31 pages, Latex2e, 5 postecript figure included, using epsf, latexsym, amssymb and fancyheadings
Scientific paper
10.1103/PhysRevD.55.5414
We compute the distribution functions for gluons at very small x and not too large values of transverse momenta. We extend the McLerran-Venugopalan model by using renormalization group methods to integrate out effects due to those gluons which generate an effective classical charge density for Weizs\"acker-Williams fields. We argue that this model can be extended from the description of nuclei at small x to the description of hadrons at yet smaller values of x. This generates a Lipatov like enhancement for the intrinsic gluon distribution function and a non-trivial transverse momentum dependence as well. We estimate the transverse momentum dependence for the distribution functions, and show how the issue of unitarity is resolved in lepton-nucleus interactions.
Jalilian--Marian Jamal
Kovner Alex
McLerran Larry
Weigert Heribert
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