The Small-x Behaviour of the Singlet Polarized Structure Function g_2 in the Double Logarithmic Approximation
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
The small-x behavior of the singlet contributions to the polarized structure function g_2(x,Q^2) is calculated in the double-logarithmic approximation of perturbative QCD. The dominant contribution is due to the gluons which, in contrast to the unpolarized case, mix with the fermions also in the small-x domain. We find a power-like growth in 1/x in the odd-signature parts of the amplitude with the same power as in the singlet function g_1(x,Q^2) at x<< 1.
Cite
@article{arxiv.hep-ph/0111306,
title = {The Small-x Behaviour of the Singlet Polarized Structure Function g_2 in the Double Logarithmic Approximation},
author = {J. Bartels and M. G. Ryskin},
journal= {arXiv preprint arXiv:hep-ph/0111306},
year = {2009}
}
Comments
20 pages, latex, 3 ps figures