Suppose EW theory generating functional: Z[sources]=∫D(A,ψ,ˉψ,H,H†)exp[i∫d4x(−14g2EWF2EW+ˉψ(D−m)ψ+DH†DH+
+θFEW˜FEW+gauge fix+ghost+sources)]
I need to calculate topological susceptibility κ(0)≡∫d4x⟨0|T(FEW˜FEW(x)FEW˜FEW(0))|0⟩θ=sources=0≡∫d4xδ2Zδθ2θ=sources=0
I know that for SUL(2) theory I can perform chiral rotations of ψ fields (electron, neutrino etc.) so that θ term wil disappear from generating functional in the limit of zero sources. Does this mean that (2) is equal to zero?
No comments:
Post a Comment