S and T Parameters from a Light Nonstandard Higgs versus Near Conformal Dynamics

Preprint number: CP3-Origins-2012-19 and DIAS-2012-20
Authors: Roshan Foadi (CP3-Louvain) and Francesco Sannino (CP3-Origins & DIAS)
External link: arXiv.org

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We determine the contribution to the S and T parameters coming from extensions of the standard model featuring relatively light nonstandard like Higgs particles. We neatly separate, using the Landau gauge, the contribution from the purely nonstandard Higgs sector from the one due to the interplay of this sector with the standard model. If the nonstandard Higgs sector derives from a new type of near conformal dynamics the formalism allows to precisely link the intrinsic underlying contribution with the experimentally relevant parameters.