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

Abstract

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.

22 pp, 8 figs

References in corpus (5)

• Update of Parton Distributions at NNLO
• Small-x behavior of the structure function F_2 and its slope partial ln(F_2)/partial ln(1/x) for "frozen" and analytic strong-coupling constants
• Bjorken Sum Rule and pQCD frontier on the move
• Reconciling the analytic QCD with the ITEP operator product expansion philosophy
• Analytic QCD - a short review

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