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2012

Viability of strongly-coupled scenarios with a light Higgs-like boson

Pich, Antonio, Rosell, Ignasi, Sanz-Cillero, Juan Jose

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We present a one-loop calculation of the oblique S and T parameters within strongly-coupled models of electroweak symmetry breaking with a light Higgs-like boson.

We use a general effective Lagrangian, implementing the chiral symmetry breaking SU(2)_L x SU(2)_R -> SU(2)_{L+R} with Goldstones, gauge bosons, the Higgs-like scalar and one multiplet of vector and axial-vector massive resonance states.
Using a dispersive representation and imposing a proper ultraviolet behaviour, we obtain S and T at the next-to-leading order in terms of a few resonance parameters.
The experimentally allowed range forces the vector and axial-vector states to be heavy, with masses above the TeV scale, and suggests that the Higgs-like scalar should have a WW coupling close to the Standard Model one.

Viability of strongly-coupled scenarios with a light Higgs-like boson · Around

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Then

S. Chatrchyan et al
2012
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A. Pich, I. Rosell and J. J. Sanz-Cillero, JHEP 1208
2012
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