On the Role of Higher Twist in Polarized Deep Inelastic Scattering

Abstract

The higher twist corrections $h^N(x)/Q^2$ to the spin dependent proton and neutron structure functions $g_1^N(x,Q^2)$ are extracted in a model independent way from experimental data on $g_1^N$ and found to be non-negligible. It is shown that the NLO QCD polarized parton densities determined from the data on g1, including higher twist effects, are in good agreement with those found earlier from our analysis of the data on g1/F1 and A1 where higher twist effects are negligible. On the contrary, the LO QCD polarized parton densities obtained from the data on g1, including higher twist, differ significantly from our previous results.

18 pages, latex, 6 figures, final version which will be published in Phys. Rev. D, fig. 5 is changed, misprints in Table 2 are removed

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• The theory and phenomenology of polarized deep inelastic scattering
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• Longitudinal Polarized Parton Densities Updated
• Angular dependences in inclusive two-hadron production at BELLE
• Impact of CLAS and COMPASS data on Polarized Parton Densities and Higher Twist
• Four-loop QCD analysis of the Bjorken sum rule vs data
• New analysis concerning the strange quark polarization puzzle
• How well will ton-scale dark matter direct detection experiments constrain minimal supersymmetry?
• Neutrino Fluxes from CMSSM LSP Annihilations in the Sun
• Global Analysis of Data on the Proton Structure Function g1 and Extraction of its Moments
• Study of spin-dependent structure functions of ${}^3\mathrm{He}$ and ${}^3\mathrm{H}$ at NNLO approximation and corresponding nuclear corrections
• Higher twists in polarized DIS and the size of the constituent quark
• Target mass corrections and higher twist effects in polarized deep-inelastic scattering
• Role of Positivity Constraints in Determining Polarized Parton Densities
• Some Remarks on Methods of QCD Analysis of Polarized DIS Data
• Nucleon electric dipole moment from polarized deep inelastic scattering
• Sensitivity of strange quark polarization to flavor SU(3) symmetry breaking
• Perturbative power Q^2-corrections to the structure function g(1)
• Colliders and Cosmology
• The relations between Bjorken polarized, Bjorken unpolarized and Gross--Llewellyn Smith sum rules
• On the Relation Between x-dependence of the Higher Twist Contribution to F_3 and g_1^p - g_1^n