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Type: Journal article
Title: Moments of isovector quark distributions from lattice QCD
Author: Detmold, W.
Melnitchouk, W.
Thomas, A.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2002; 66(5):054501-1-054501-14
Publisher: American Physical Soc
Issue Date: 2002
ISSN: 1550-7998
Organisation: Special Research Centre for the Subatomic Structure of Matter
Abstract: We present a complete analysis of the chiral extrapolation of lattice moments of all twist-2 isovector quark distributions, including corrections from Nπ and Δπ loops. Even though the Δ 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.
Rights: ©2002 American Physical Society
DOI: 10.1103/PhysRevD.66.054501
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Special Research Centre for the Subatomic Structure of Matter publications

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