Moments of Isovector Quark Distributions from Lattice QCD

Details Moments of Isovector Quark Distributions from Lattice QCD Moments of Isovector Quark Distributions from Lattice QCD

2002-06-03

arxiv.org/abs/hep-lat/0206001v2

Phys.Rev.D66:054501,2002

Physics

High Energy Physics

High Energy Physics - Lattice

34 pages, 10 figs, minor modifications to coincide with version accepted for publication

Scientific paper

10.1103/PhysRevD.66.054501

We present a complete analysis of the chiral extrapolation of lattice moments of all twist-2 isovector quark distributions, including corrections from N pi and Delta pi loops. Even though the Delta resonance formally gives rise to higher order non-analytic structure, the coefficients of the higher order terms for the helicity and transversity moments are large and cancel much of the curvature generated by the wave function renormalization. The net effect is that, whereas the unpolarized moments exhibit considerable curvature, the polarized moments show little deviation from linearity as the chiral limit is approached.

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