Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-30
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, various style files, Contribution to the Proceedings of HiX2010, Newport News, October, 2010
Scientific paper
The results of a recent next-to-leading order QCD analysis of the world data on polarized deep inelastic scattering are reported. New parameterizations are derived for the quark and gluon distributions, accounting for the massive Wilson coefficient for the charm quarks, and the value of $\alpha_s(M_z^2)$ is determined with correlated errors. We obtain $\alpha_s^{\rm NLO}(M_Z^2)= 0.1132 {array}{l} + 0.0056 -0.0095 {array}$. Limits on potential higher twist contributions to the structure function $g_1(x,Q^2)$ are derived. We also compare to the results obtained by other groups.
Blümlein Johannes
Bottcher Helmut
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