Determination of polarized parton distribution functions
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
We study parametrization of polarized parton distribution functions in the \alpha_s leading order (LO) and in the next-to-leading order (NLO). From \chi^2 fitting to the experimental data on A_1, optimum polarized distribution functions are determined. The quark spin content \Delta\Sigma is very sensitive to the small-x behavior of antiquark distributions which suggests that small-x data are needed for precise determination of \Delta\Sigma. We propose three sets of distributions and also provide FORTRAN library for our distributions.
Cite
@article{arxiv.hep-ph/0012280,
title = {Determination of polarized parton distribution functions},
author = {M. Hirai and H. Kobayashi and M. Miyama},
journal= {arXiv preprint arXiv:hep-ph/0012280},
year = {2009}
}
Comments
1+5 pages, LATEX, aipproc.sty, 4 eps figures. Talk given at the 14th International Spin Physics Symposium, Osaka, Japan, October 16-21, 2000