On the renormalization of the electroweak chiral Lagrangian with a Higgs

Abstract

We consider the scalar sector of the effective non-linear electroweak Lagrangian with a light "Higgs" particle, up to four derivatives in the chiral expansion. The complete off-shell renormalization procedure is implemented, including one loop corrections stemming from the leading two-derivative terms, for finite Higgs mass. This determines the complete set of independent chiral invariant scalar counterterms required for consistency; these include bosonic operators often disregarded. Furthermore, new counterterms involving the Higgs particle which are apparently chiral non-invariant are identified in the perturbative analysis. A novel general parametrization of the pseudoescalar field redefinitions is proposed, which reduces to the various usual ones for specific values of its parameter; the non-local field redefinitions reabsorbing all chiral non-invariant counterterms are then explicitly determined. The physical results translate into renormalization group equations which may be useful when comparing future Higgs data at different energies.

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Cited by in corpus (5)

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• Same-sign WW Scattering in the HEFT: Discoverability vs. EFT Validity
• XEFT, the challenging path up the hill: dim = 6 and dim = 8
• Electroweak chiral Lagrangians and the Higgs properties at the one-loop level