Beyond the Standard Model

The structure of the electroweak part of the standard model was explored in detail in Chapter 7, but for convenience we summarize the Lagrangian density after spontaneous symmetry breaking∗: L = Lgauge + Lφ + ∑ r ψ¯r ( i 6∂ −mr − mrH ν ) ψr − g 2 √ ( JµWW − µ + J ) − eJµQAµ − g 2 cos θW JµZZµ, (8.1) where the self-interactions for the W±, Z, and γ are given in (7.42) and (7.43), Lφ is given in (7.39), and the fermion currents in (7.60), (7.70), and (7.74).