Chiral dynamics beyond the standard model

The SM Lagrangian whithout physical scalars is rewritten as the LO of a Low-Energy Effective Theory invariant under a higher non linear symmetry S-nat superset of SU(2)(W) x U(1)(Y). Soft breaking of S-nat defines a hierarchy of non standard effects dominated by universal couplings of right handed quarks to W. The interface of corresponding EW tests with non perturbative QCD aspects is briefly discussed.