Determination of polarized parton distribution functions

Details Determination of polarized parton distribution functions Determination of polarized parton distribution functions

2000-12-21

arxiv.org/abs/hep-ph/0012280v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

1+5 pages, LATEX, aipproc.sty, 4 eps figures. Talk given at the 14th International Spin Physics Symposium, Osaka, Japan, Octob

Scientific paper

10.1063/1.1384105

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.

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