Bjorken sum rule in QCD with analytic coupling
arXiv:1712.06048 · doi:10.1088/1742-6596/938/1/012055
Abstract
We present details of study of the Bjorken polarized sum rule carried out recently in [1] within the range of energies where the data were collected by JLAB collaboration, 0.05 GeV2 < Q2 < 3 GeV2. Three approaches to QCD with analytic (holomorphic) coupling are considered: Analytic Perturbation Theory (APT), Two-delta analytic QCD, and Three-delta lattice-motivated analytic QCD in the three-loop and four-loop MiniMOM schemes. The new frameworks with respective couplings give results which agree well with the experimental data for 0.5 GeV2 < Q2 < 3GeV2 already when only one higher-twist term is taken into account.
6 pages, 2 figures, talk given at the XVIIth International Workshop on High Energy Spin Physics (DSPIN-17), September 11 - 15, 2017
References in corpus (11)
- Lattice gluodynamics computation of Landau-gauge Green's functions in the deep infrared
- Adler Function, Bjorken Sum Rule, and the Crewther Relation to Order alpha_s^4 in a General Gauge Theory
- Bound state approach to the QCD coupling at low energy scales
- Experimental study of isovector spin sum rules
- High precision determination of the -evolution of the Bjorken Sum
- QCD coupling below 1 GeV from quarkonium spectrum
- Bjorken Sum Rule and pQCD frontier on the move
- Extended analytic QCD model with perturbative QCD behavior at high momenta
- anQCD: a Mathematica package for calculations in general analytic QCD models
- Analyticity properties of three-point functions in QCD beyond leading order
- Higher twists in polarized DIS and the size of the constituent quark