Is the Sullivan process compatible with QCD chiral dynamics?

被引：75

作者：

Chen, JW ^{[1
]}

Ji, XD ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

PHYSICS LETTERS B | 2001年 / 523卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(01)01337-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the leading non-analytic quark-mass dependence in the moments of isovector quark distributions using heavy-baryon chiral perturbation theory. The results differ from what has been obtained from the Sullivan process in which hard scattering occurs through the virtual pion cloud of the nucleon. Our results provide useful guidance in formulating meson-cloud models consistent with chiral dynamics and can be used to constrain the extrapolations of the existing lattice QCD results to the physical quark masses. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：107 / 110

页数：4

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