标题： 从QCD中的组成夸克：微扰理论和红外线 显示英文标题

标题： Constituent Quarks from QCD: Perturbation Theory and the Infra-red

摘要： 构建带电场（如电子或夸克）的规范不变描述的系统方法被描述。 然后必须从众多可能性中挑选出物理上有意义的描述，并为此我们给出一种描述的物理解释。 概述了支持这种解释的微扰计算。 报告了观察孤立夸克的非微扰障碍。 这设定了组成夸克模型的极限。 显示英文摘要

摘要： Systematic approaches to building up gauge invariant descriptions of charged fields, such as electrons or quarks, are described. Physically relevant descriptions must then be singled out from a multiplicity of possibilities and to this end we give a physical interpretation of one description. Perturbative calculations which back up this interpretation are outlined. A non-perturbative obstruction to observing an isolated quark is reported. This sets the limits of the constituent quark model.