Moments of Isovector Quark Distributions from Lattice QCD

Detmold, W; Melnitchouk, Wally; Thomas, A W

doi:10.1103/PhysRevD.66.054501

Title: Moments of Isovector Quark Distributions from Lattice QCD

Journal Article · Sun Sep 01 00:00:00 EDT 2002 · Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRevD.66.054501· OSTI ID:795012

Detmold, W; Melnitchouk, Wally; Thomas, A W

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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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Energy Research (ER) (US)

DOE Contract Number:: AC05-84ER40150

OSTI ID:: 795012

Report Number(s):: JLAB-THY-02-26; DOE/ER/40150-2079; TRN: US0206089

Journal Information:: Phys. Rev. D, Vol. 66; Other Information: PBD: 1 May 2002; PBD: 1 Sep 2002

Country of Publication:: United States

Language:: English

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