feynlag.models.standard_model¶

feynlag.models.standard_model(generations=1, physical_basis=True, name='StandardModel')[source]¶

The plain SM electroweak + lepton sector, ready to use.

Builds the electroweak scaffold plus generations lepton doublets and charged right-singlets, each contributing a gauge current, and (by default) rotates to the physical basis. Yukawa couplings are intentionally not added — a model that needs charged-lepton masses adds its own (see examples/sm_decays.py), keeping this builder free of a pheno dependency and unopinionated about flavour.

Returns:: StandardModel.