Global analysis of AAC for determining polarized parton distribution functions

Details Global analysis of AAC for determining polarized parton distribution functions Global analysis of AAC for determining polarized parton distribution functions

2006-01-11

arxiv.org/abs/hep-ph/0601087v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures, to be published in the proceedings of the XVIIth Particles and Nuclei International Conference (PANIC), Sa

Scientific paper

10.1063/1.2220273

We report global analysis results for polarized parton distribution functions in the nucleon. The optimum distributions are determined by using spin asymmetry data on polarized lepton scattering on proton, neutron, and deuteron. Their uncertainties are estimated by the Hessian method. As a result, polarized quark distributions are relatively well determined, whereas the polarized gluon distribution has a large uncertainty band. We find that the obtained gluon distribution is compatible with recent \Delta g/g measurements in high-p_T hadron productions.

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