2002/08/09 by J. Bartelski, S. Tatur
Physics and Astronomy · #hep-ph
published as Acta Phys.Polon. B33 (2002) 2673-2680 · latex, 8 pages, 2 eps figures. To apear in Acta Physica Polonica. Dedicated to prof. Stefan Pokorski on the occasion of his 60th birthday
arxiv created 2002/08/09 · arxiv updated 2009/11/30
In order to determine polarized parton densities in nucleon we have made fits using all experimental data on spin asymmetries measured in the deep inelastic scattering on different nucleon targets. We have used in our analysis next to leading order QCD corrections in barMS renormalization scheme. The functional forms of polarized densities are based on the fit to unpolarized deep inelastic data made by the MRST group (MRST 99). We have concentrated on different models for gluon spin distributions. In the best fit we get for gluon polarization (at Gev2) Delta G=-1.0 +/- 0.6. The obtained result does not depend very much on various model assumptions