Sommaire:

We introduce a set of pseudo-observables (PO) characterizing the properties of Higgs decays in generic SM extensions with no new particles below the Higgs mass. The PO represent a systematic generalization of the "kappa-framework" so far adopted by the LHC experiments, providing a useful bridge between data and theory predictions (EFTs or models). We analyze how they can be used to test various dynamical and symmetry hypotheses about the Higgs sector. We discuss the bounds on the Higgs PO implied by EW constraints, under the assumption that the Higgs particle is the massive excitation of an SU(2)L doublet. Using such bounds, detailed predictions for various h->4l observables are presented.

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