Description of the spin structure function g_1 at arbitrary $x$ and arbitrary Q^2
High Energy Physics - Phenomenology
2007-11-30 v1
Abstract
The explicit expressions describing the structure function g_1 at arbitrary x and Q^2 are obtained. In the first place, they combine the well-known DGLAP expressions for g_1 with the total resummation of leading logarithms of x, which makes possible to cover the kinematic region of arbitrary x and large Q^2. In order to cover the small-Q^2 region the shift Q^2 -> Q^2 + mu^2 in the large-Q^2 expressions for g_1 is suggested and values of mu are estimated. The expressions obtained do not require singular factors x^{-a} in the fits for initial parton densities.
Cite
@article{arxiv.0711.4764,
title = {Description of the spin structure function g_1 at arbitrary $x$ and arbitrary Q^2},
author = {B. I. Ermolaev and M. Greco and S. I. Troyan},
journal= {arXiv preprint arXiv:0711.4764},
year = {2007}
}
Comments
Invited talk at XII Workshop on high energy spin physics DSPIN-07, Sept,3-7, 2007, Dubna, Russia. 6 pages, no figures