A determination of gluon spin distribution from the deep inelastic scattering data

Details A determination of gluon spin distribution from the deep inelastic scattering data A determination of gluon spin distribution from the deep inelastic scattering data

2002-08-09

arxiv.org/abs/hep-ph/0208090v1

Acta Phys.Polon. B33 (2002) 2673-2680

Physics

High Energy Physics

High Energy Physics - Phenomenology

latex, 8 pages, 2 eps figures. To apear in Acta Physica Polonica. Dedicated to prof. Stefan Pokorski on the occasion of his 60

Scientific paper

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 bar{MS} 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 Gev^{2}) Delta G=-1.0 +/- 0.6. The obtained result does not depend very much on various model assumptions

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