Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-05-09
Acta Phys.Polon. B34 (2003) 2731-2740
Physics
High Energy Physics
High Energy Physics - Phenomenology
latex 12 pages, 3 eps figures
Scientific paper
In order to determine polarized parton distributions we have made a new NLO QCD fit using all experimental data on spin asymmetries measured in the deep inelastic scattering on different nucleon targets. The functional form of such densities is based on MRST 2001 results for unpolarized ones . We get for polarization of quarks (at Q^2 = 1 GeV^2): Delta u = 0.87, Delta d = -0.38, Delta s = -0.04. The total quark polarization is rather big and we obtain: Delta Sigma = 0.44. As a result of our fit we get a_3 = g_A = 1.24 the value which is close to experimental number. With negligible Delta s and rather big Delta Sigma (comparable to a_8) the results of our new fit are quite different in character from other fits.
Bartelski Jan
Tatur Stanislaw
No associations
LandOfFree
A new determination of polarized parton densities in the nucleon does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new determination of polarized parton densities in the nucleon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new determination of polarized parton densities in the nucleon will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4531