论文标题
Feynman图和同源扰动引理的对称因子
Symmetry Factors of Feynman Diagrams and the Homological Perturbation Lemma
论文作者
论文摘要
我们讨论具有多项式潜力的标量场理论的Feynman图的对称因素。在为它们提供了简洁的一般公式之后,我们提供了一个基本和直接的证据,即当使用同源扰动引理计算散射幅度时,每个贡献Feynman图确实都包含在正确的对称因子中。
We discuss the symmetry factors of Feynman diagrams of scalar field theories with polynomial potential. After giving a concise general formula for them, we present an elementary and direct proof that when computing scattering amplitudes using the homological perturbation lemma, each contributing Feynman diagram is indeed included with the correct symmetry factor.