论文标题
QCD真空域模型内的光伪层中介子的偶极极化
Dipole polarizabilities of light pseudoscalar mesons within the Domain Model of QCD vacuum
论文作者
论文摘要
光拟尺度介体的偶极极化是在基于几乎所有地方均匀的Abelian（anti-）自动划分的Gluuon领域的统计集合的平均场方法的框架中计算出的，这是QCD Vacuum的域模型。在这种方法中，人们衍生了介子场的非局部有效作用，该作用描述了两点相关函数，以及所有可能的强，弱和电磁相互作用的介子磁场，包括其激发态。具体而言，中间标量介子场在极化形成中的作用得到了解决。在域模型中，由光Quark-Anti-Quark对组成的标量介子场的传播器在真实动量上没有极点。事实证明，对于带电的亲腐和kaons，中间标量场对极化性的贡献是很大的，但不是最大的。计算出的极化能力与指南针实验数据和手性扰动理论的结果是合理的一致性。
Dipole polarizabilities of light pseudoscalar mesons are calculated in the framework of the mean field approach to QCD vacuum and bosonization based on the statistical ensemble of almost everywhere homogeneous Abelian (anti-)self-dual gluon fields -- the domain model of QCD vacuum. In this approach, one derives a nonlocal effective action of meson fields which describes two-point correlation functions and all possible strong, weak and electromagnetic interactions of meson fields including their excited states. Specifically, the role of intermediate scalar meson fields in formation of the polarizabilities is addressed. Within the domain model, the propagators of scalar meson fields composed of light quark-anti-quark pairs have no poles at real momenta. It turns out that for charged pions and kaons, the contribution of intermediate scalar fields to polarizability is substantial, but not the largest one. The calculated polarizabilities are in reasonable agreement with COMPASS experimental data and results of Chiral Perturbation Theory.
