We present a review of recent applications of nonlocal chiral effective theory to hadron structure studies. Starting from a nonlocal meson–baryon effective chiral Lagrangian, we show how the introduction of a correlation function representing the finite extent of hadrons regularizes the meson loop integrals and introduces momentum dependence in vertex form factors in a gauge invariant manner. We apply the framework to the calculation of nucleon electromagnetic form factors, unpolarized and polarized parton distributions, as well as transverse momentum dependent distributions and generalized parton distributions.

中文翻译：

---

非局域手性有效理论中的核子形状因子和部分子分布

我们回顾了最近非局域手性有效理论在强子结构研究中的应用。从非局部介子-重子有效手性拉格朗日量开始，我们展示了如何引入表示强子有限范围的相关函数来规范化介子环积分，并以规范不变的方式在顶点形状因子中引入动量依赖性。我们将该框架应用于计算核子电磁形状因子、非极化和极化部分子分布，以及横向动量相关分布和广义部分子分布。