出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 and the value of as(M2 z ) is determined. We obtain aNLO s (M2 Z) = 0.1132 +0.0056 −0.0095 . Potential higher twist contributions to the structure function g1(x,Q2) are considered.
