AAC analysis of polarized parton distributions with uncertainties

Details AAC analysis of polarized parton distributions with uncertainties AAC analysis of polarized parton distributions with uncertainties

2004-08-03

arxiv.org/abs/hep-ph/0408024v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, LaTeX, 4 eps files, dis04.cls, to be published in the proceedings of the 12th International Workshop on Deep Inelasti

Scientific paper

We report recent studies of the Asymmetry Analysis Collaboration (AAC) on polarized parton distribution functions (PDFs). Using the data on the spin symmetry A_1 in deep inelastic lepton scattering, we investigate optimum polarized PDFs. Their uncertainties are estimated by the Hessian method. The uncertainties are large for the polarized antiquark and gluon distributions. We discuss the role of accurate SLAC-E155 proton data on the determination of the PDFs. The obtained distributions are compared with other parametrization results.

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