Comparison of the fits to data on polarised structure functions and spin asymmetries

Details Comparison of the fits to data on polarised structure functions and spin asymmetries Comparison of the fits to data on polarised structure functions and spin asymmetries

2001-07-18

arxiv.org/abs/hep-ph/0107202v1

Phys.Rev. D65 (2002) 034002

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, latex, 2 figures

Scientific paper

10.1103/PhysRevD.65.034002

In order to obtain polarised parton densities we have made next to leading order QCD fit using experimental data on deep inelastic structure functions on nucleons. This fit is compared with the updated fit to coresponding spin asymmetries. We get very similar results for all fits also for different data samples. It seems that only polarised parton densities for non-strange quarks $\Delta u$ and $\Delta d$ are relatively well determined from the present deep inelastic experiments. Inegrated gluon contribution at $Q^{2}=1 {\rm GeV^{2}}$ is, as in our previous fits, very small.

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