Analytic and "frozen" QCD coupling constants up to NNLO from DIS data

Details Analytic and "frozen" QCD coupling constants up to NNLO from DIS data Analytic and "frozen" QCD coupling constants up to NNLO from DIS data

2010-08-03

arxiv.org/abs/1008.0545v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pp, 8 figs

Scientific paper

Deep inelastic scattering data on the F_2 structure function provided by the BCDMS, SLAC and NMC collaborations are analyzed in the non-singlet approximation with the analytic and "frozen" modifications of the strong coupling constant featuring no unphysical singularity (the Landau pole). Improvement of agreement between theory and experiment, with respect to the case of the standard perturbative definition of alpha_s considered recently, is observed and the behavior of the higher twist terms in the next-to-next-to-leading-order is found to be confirming earlier studies on the subject.

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