Derivation of the Ward--Takahashi Identity in GWS Gauge Theory
Derivation of the Ward-Takahashi Identity in GWS Gauge Theory

With the help of a postulate of gauge group parameter involved with ghost fields, the infinitesimal gauge transformation laws preserving the gauge-invariance of the quantum Lagrangian itself of the quantized Glashow- Weinberg-Salam model are established precisely. The corresponding Ward-Takahashi identity for the model is derived exactly.