The symmetry group of Feynman diagrams and consistency of the BPHZ renormalization scheme

• 作 者: Kun Hao Kangjie Shi
• 机 构: Institute of Modem Physics, Northwest University, Xi’an 710127, China;C.N. Yang Institute for Theore
• 出 处: 中国物理C（英文版）
• 发表日期: 2021年2期
• 关键词: BPHZ renormalization Feynman diagram symmetry group perturbation Hamiltonian

We study the relation between the symmetry group of a Feynman diagram and its reduced diagrams.We then prove that the counterterms in the BPHZ renormalization scheme are consistent with adding counterterms to the interaction Hamiltonian in all cases,including that of Feynman diagrams with symmetry factors.