Are Parton Distributions Positive?
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
We show that the naive positivity conditions on polarized parton distributions which follow from their probabilistic interpretation in the naive parton model are reproduced in perturbative QCD at the leading log level if the quark and gluon distribution are defined in terms of physical processes. We show how these conditions are modified at the next-to-leading level, and discuss their phenomenological implications, in particular in view of the determination of the polarized gluon distribution
Cite
@article{arxiv.hep-ph/9808462,
title = {Are Parton Distributions Positive?},
author = {Stefano Forte and Guido Altarelli and Giovanni Ridolfi},
journal= {arXiv preprint arXiv:hep-ph/9808462},
year = {2009}
}
Comments
5 pages, 4 figures, latex with espcrc2 and epsfig