Breakdown of chiral expansion for parton distributions
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Lattice
Nuclear Experiment
Abstract
In the framework of the chiral perturbation theory we computed two- and three-loop corrections to the pion parton distributions which posses -function singularities at x->0. This calculation explicitly demonstrates that in the region of small x ~ mpi^2/(4 pi F)^2 standard ChPT breaks down and one needs resummation of all orders. We give an example of such resummation.
Keywords
Cite
@article{arxiv.0707.2208,
title = {Breakdown of chiral expansion for parton distributions},
author = {N. Kivel and M. V. Polyakov},
journal= {arXiv preprint arXiv:0707.2208},
year = {2008}
}
Comments
10 pages, 7 figures