Abstract: The three Nambu-Goldstone bosons in the longitudinal modes of the W and Z  together with the Higgs boson span a 4-dimensional manifold. The geometry of this manifold, invariant under field re-parametrization, encodes the scalar dynamics which are vastly unexplored at present. The small but finite curvature limit recovers the Standard Model and  corrections in its effective field theory. First order corrections in this framework encode widely different physics and serve to test and constrast the different facets of the…