The Continual Approach in the Yang‐Mills Theory in the External Non‐Abelian Field

The theory of Yang‐Mills field in interaction with matter fields is considered in the presence of external gauge field. A closed expression for the generating functional of the Green functions is obtained, and a detailed analysis of the Green functions of the scalar, spinor, ghost and Yang‐Mills fields is performed. The path‐integral solution for all these Green functions is obtained, which includes the functional averaging over the classical trajectories in the space of commuting and anticommuting variables, the latter being anociated with the particle spin and isospin. For illustration an arbitrary Abelian‐like external field is considered, as well as non‐Abelian‐like constant external field.