Evolution at small x
High Energy Physics - Phenomenology
2014-11-17 v2
Abstract
At present there is no correct theory of evolution of F_2(x,Q^2) at small x. It is a mixture of hard and soft pomeron exchange and perturbative QCD very successfully describes the evolution of the hard-pomeron component. This allows the gluon density to be calculated. It is somewhat different from what is conventionally supposed, but it leads to a clean PQCD description of the data for the charm structure function. Perturbative QCD breaks down for the evolution of the soft-pomeron component of F_2(x,Q^2).
Cite
@article{arxiv.hep-ph/0305171,
title = {Evolution at small x},
author = {A. Donnachie and P. V. Landshoff},
journal= {arXiv preprint arXiv:hep-ph/0305171},
year = {2014}
}
Comments
To appear in the special issue of Acta Physica Polonica to celebrate the 65th Birthday of Professor Jan Kwiecinski. 12 pages with 9 figures