Composite Higgs: Principles and Application

Who: Andrea Wulzer (University of Padova & INFN Padova)
When: Monday, May 13, 2013 at 14:15
Where: U49

I will review the theoretical motivations for regarding the observed Higgs as a composite pseudo-Nambu-Golstone boson, and I will illustrate the effective field theory methodologies that can be used to derive the generic phenomenological implications of this idea. For what the LHC experimental program is concerned, the main signatures are moderate deviations of the Higgs coupling from the Standard Model predictions and the direct production of colored fermionic partners of the top quark, the so-called top partners, whose existence is deeply connected with the generation of the Higgs mass. While the precision of coupling measurement is not yet sufficient to draw conclusions, direct top partner searches are already probing the relevant parameter space of Composite Higgs models. There are very good perspectives to observe these states or to exclude their existence by employing the forthcoming 13 TeV LHC data, in the latter case the Composite Higgs scenario will have to be abandoned, at least in its present form.

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