Speaker: Helmut BOETTCHER
Title
QCD analysis of polarized deep inelastic scattering data and polarized parton distributions
Abstract
A QCD analysis of the world data on polarized deep inelastic scattering is presented in leading and next-to-leading order. New parametrizations are derived for the quark and gluon distributions and the value of alpha_s(M_z) is determined. Emphasis is put on the derivation of the error bands and correlations for these distributions, which are directly applicable to determine experimental errors of other polarized observables. The impact of the variation of both the renormalization and factorization scales on the distributions and the value of alpha_s is studied. Finally we perform a factorization-scheme invariant QCD analysis based on the observables g_1(x,Q^2) and dg_1(x,Q^2)/dlog(Q^2) in next-to-leading order, which is compared to the standard analysis.





Slides