Higher Twist contributions to the Structure Functions F_2(x,Q^2) and g_2(x,Q^2)

Abstract

We report on recent results on higher twist contributions to the unpolarized structure functions $F_2^{p,d}(x,Q^2)$ at N${}^3$LO in the large $x$ region and constraints on the twist--3 contribution to polarized structure function $g_2(x,Q^2)$.

arXiv comment5 pages, some style files, 3 figures, Proceedings of DIS2012, Bonn, Germany

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• The ABM parton distributions tuned to LHC data
• A Critical Appraisal and Evaluation of Modern PDFs
• Calculating Massive 3-loop Graphs for Operator Matrix Elements by the Method of Hyperlogarithms
• The three-loop polarized singlet anomalous dimensions from off-shell operator matrix elements
• The first-order factorizable contributions to the three-loop massive operator matrix elements $A_{Qg}^{(3)}$ and $\Delta A_{Qg}^{(3)}$
• Higher Order Heavy Quark Corrections to Deep-Inelastic Scattering