On the effect of resonances in composite Higgs phenomenology

By Roberto Contino, Duccio Pappadopulo, D. Marzocca, R. Rattazzi. 2011

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We consider a generic composite Higgs model based on the coset SO(5)/SO(4) and study its phenomenology beyond the leading low-energy effective lagrangian approximation. Our basic goal is to introduce in a controllable and simple way the lowest-lying, possibly narrow, resonances that may exist is such models. We do so by proposing a criterion that we call partial UV completion. We characterize the simplest cases, corresponding respectively to a scalar in either singlet or tensor representation of SO(4) and to vectors in the adjoint of SO(4). We study the impact of these resonances on the signals associated to high-energy vector boson scattering, pointing out for each resonance the characteristic patterns of depletion and enhancement with respect to the leading-order chiral lagrangian. En route we derive the O(p4) general chiral lagrangian and discuss its peculiar accidental and approximate symmetries.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1d4afd27aa7c53dfa359cc557cdabf9fafad1c15

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