Global U ( 1 ) Y ⊗ BRST symmetry and the LSS theorem: Ward-Takahashi identities governing Green’s functions, on-shell T -matrix elements, and the effective potential in the scalar sector of the spontaneously broken extended Abelian Higgs model

The weak-scale U(1)Y Abelian Higgs model (AHM) is the simplest spontaneous symmetry breaking (SSB) gauge theory: a scalar ϕ=12(H+iπ)≡12H˜eiπ˜/⟨H⟩ and a vector Aμ. The extended AHM (E-AHM) adds certain heavy (MΦ2,Mψ2∼MHeavy2≫⟨H⟩2∼mWeak2) spin S=0 scalars Φ and S=12 fermions ψ. In Lorenz gauge, ∂μAμ=0...

Ausführliche Beschreibung