Supported by National Natural Science Foundation of China (90303006)
Gauge symmetry imposes powerful constraints on the basic vertex functions of gauge theories,leading to the exact relations among Green's functions,referred to as the Ward-Takahashi (WT) relations.
Supported by National Natural Science Foundation of China (90303006,10875174)
So far,the Ward-Takahashi identity in Abelian gauge theory QED ( Quantum Electrodynamics) and the Slavnov-Taylor identity in non-Abelian gauge theory QCD (Quantum Chromodynamics) derived
the National Natural Science Foundation of China (Grant No.90303006)
Nonperturbative studies such as confinement and dynamical chiral symmetry breaking need the nonperturbative interacting vertex functions. In this paper, an approach to determining the full fermion-boson vertex functio...