Equation Icon  ℒ = ∂ ϕˆ∂μˆϕ + e2e1(ϕˆ)( ∂ ˆχE ∂μˆχE + ∂ ˆχC∂ μˆχC ) + e4e1(ϕˆ) (∂ ˆχ∂μχˆ) + ⋅⋅ ⋅ (7.16 ) SU(2,1)∕S(U (2)×U(1)) μ μ μ μ