Abstract
We derive the Salam-Weinberg model by gauging an internal simple supergroup SU( 2 1 ) . The theory uniquely assigns the correct SU(2) L ⊗ U(1) eigenvalues for all leptons, fixes θ W = 30°, generates the W ± σ, Z 0 σ and A σ together with the Higgs-Goldstone I L = 1 2 scalar multiplets as gauge fields, and imposes the standard spontaneous breakdown of SU(2) L ⊗ U(1). The masses of intermediate bosons and fermions are directly generated by SU( 2 1 ) universality, which also fixes the Higgs field coupling.
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