One-loop bosonic effective Lagrangian for a dynamical Higgs
Pedro Machado (Universidad Autónoma de Madrid)

We consider off-shell renormalization of the scalar sector of the effective electroweak Lagrangian for a dynamical Higgs, up to four derivatives in the chiral expansion. We determine the complete set of independent chiral invariant scalar counterterms required for consistency, which include bosonic operators often disregarded, and we obtain new apparent non chiral-invariant counterterms involving the Higgs particle and the longitudinal components of the gauge bosons. A new general parametrisation of the latter is proposed. The physical results translate into renormalisation group equations which may be useful when comparing future Higgs data at different energies.