Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-07-31
AIP Conf.Proc. 602 (2001) 94-99
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages LATEX, 4 aps style and other files, 3 eps-files, to appear in the Proceedings of `QCD at Work', Martina Franca, June 2
Scientific paper
10.1063/1.1435915
A QCD analysis of the world data on inclusive polarized deep inelastic scattering of leptons on nucleons is presented in leading and next-to-leading order. New parameterizations 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 fully correlated error bands 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 value of $\alpha_s$ is studied. Finally a factorization-scheme invariant QCD analysis based on the observables $g_1(x,Q^2)$ and $d g_1(x,Q^2)/d \log(Q^2)$ is performed in next-to-leading order, which is compared to the standard analysis.
Blümlein Johannes
Bottcher Helmut
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