Determination of polarized parton distribution functions
Abstract
We study parametrization of polarized parton distribution functions in the αs leading order (LO) and in the next-to-leading order (NLO). From 2 fitting to the experimental data on A1, optimum polarized distribution functions are determined. The quark spin content is very sensitive to the small-x behavior of antiquark distributions which suggests that small-x data are needed for precise determination of . We propose three sets of distributions and also provide FORTRAN library for our distributions.
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