Moments of isovector quark distributions from lattice QCD

被引：70

作者：

Detmold, W ^{[1
]}

Melnitchouk, W

Thomas, AW

机构：

[1] Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia

[2] Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia

[3] Jefferson Lab, Newport News, VA 23606 USA

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.66.054501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a complete analysis of the chiral extrapolation of lattice moments of all twist-2 isovector quark distributions, including corrections from Npi and Deltapi 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.

引用

页数：14

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