Unitarity implications of diboson resonance in the TeV region for Higgs physics
Giacomo Cacciapaglia, Mads T. Frandsen
TL;DR
This paper explores how a hypothetical TeV-scale diboson resonance affects unitarity in WW scattering and its implications for Higgs physics, distinguishing between weakly and strongly coupled scenarios.
Contribution
It analyzes the unitarity constraints of a TeV-scale diboson resonance and their implications for Higgs couplings and potential new physics.
Findings
Weakly coupled spin-1 resonance compatible with SM-like Higgs
Strongly coupled models require reduced Higgs couplings or additional new physics
Resonance couplings influence the scale of new physics beyond the diboson resonance
Abstract
We investigate the implications of a putative new resonance in the TeV region coupled to the weak bosons. By studying perturbative unitarity in longitudinal WW scattering, we find that a weakly coupled spin-1 resonance, that explains the ATLAS diboson excesses, is allowed with a SM-like Higgs. On the other hand, larger values of the resonance couplings, preferred in models of strong dynamics, would imply either sizeable reduction of the Higgs couplings or new physics, beyond the diboson resonance, at a few TeV.
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