BRS symmetry for Yang - Mills theory with exact renormalization group ∗


In the exact renormalization group (RG) flow in the infrared cutoff Λ one needs boundary conditions. In a previous paper on SU(2) Yang-Mills theory we proposed to use the nine physical relevant couplings of the effective action as boundary conditions at the physical point Λ = 0 (these couplings are defined at some non-vanishing subtraction point µ = 0). In… (More)