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arXiv · 1307.1958

Strongly Coupled Models with a Higgs-like Boson

Antonio Pich·Ignasi Rosell·Juan Jose Sanz-Cillero
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Abstract

Considering the one-loop calculation of the oblique S and T parameters, we have presented a study of the viability of strongly-coupled scenarios of electroweak symmetry breaking with a light Higgs-like boson. The calculation has been done by using an effective Lagrangian, being short-distance constraints and dispersive relations the main ingredients of the estimation. Contrary to a widely spread believe, we have demonstrated that strongly coupled electroweak models with massive resonances are not in conflict with experimental constraints on these parameters and the recently observed Higgs-like resonance. So there is room for these models, but they are stringently constrained. The vector and axial-vector states should be heavy enough (with masses above the TeV scale), the mass splitting between them is highly preferred to be small and the Higgs-like scalar should have a WW coupling close to the Standard Model one. It is important to stress that these conclusions do not depend critically on the inclusion of the second Weinberg sum rule.

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Antonio Pich, Ignasi Rosell, Juan Jose Sanz-Cillero. 2013-07-08. Strongly Coupled Models with a Higgs-like Boson. https://doi.org/10.1051/epjconf%2F20136019009

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