PROTON SPIN STRUCTURE FROM LATTICE QCD

被引：109

作者：

FUKUGITA, M

KURAMASHI, Y

OKAWA, M

UKAWA, A

机构：

[1] INST ADV STUDY, PRINCETON, NJ 08540 USA

[2] NATL LAB HIGH ENERGY PHYS, KEK, TSUKUBA, IBARAKI 305, JAPAN

[3] UNIV TSUKUBA, INST PHYS, TSUKUBA, IBARAKI 305, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.75.2092

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A lattice QCD calculation of the proton matrix element of the flavor singlet axial-vector current is reported. Both the connected and disconnected contributions are calculated, for the latter employing the variant method of wall source without gauge fixing. From simulations in quenched QCD with the Wilson quark action on a 16(3) X 20 lattice at beta = 5.7 (the lattice spacing a approximate to 0.14 fm), we find Delta Sigma = Delta u + Delta d + Delta s = +0.638(54) - 0.347(46) - 0.109(30) = +0.18(IO) with the disconnected contribution to Delta u and Delta d equal to -0.119(44), which is reasonably consistent with the experiment.

引用

页码：2092 / 2095

页数：4

共 28 条

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