Realistic Composite Higgs Models
By C. Anastasiou, E. Furlan, J. Santiago. 2009
158 citations recorded by the source corpus.
We study the role of fermionic resonances in realistic composite Higgs models. We consider the low energy effective description of a model in which the Higgs arises as the pseudo-Goldstone boson of an SO(5)/SO(4) global symmetry breaking pattern. Assuming that only fermionic resonances are present below the cutoff of our effective theory, we perform a detailed analysis of the electroweak constraints on such a model. This includes the exact one-loop calculation of the T parameter and the anomalous Zb{sub L}b{sub L} coupling for arbitrary new fermions and couplings. Other relevant observables like b{yields}s{gamma} and {delta}B=2 processes have also been examined. We find that, while minimal models are difficult to make compatible with electroweak precision tests, models with several fermionic resonances, such as the ones that appear in the spectrum of viable composite Higgs models from warped extra dimensions, are fully realistic in a large region of parameter space. These fermionic resonances could be the first observable signature of the model at the CERN LHC.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/988603e7bea6622b0ad155538571ffe4f9016cbe
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Citations in the corpus
- Light top partners and precision physics (2013, background): “[27] shows that the new physics contributions are finite, in agreement with the results of our analysis.”
- A first top partner hunter’s guide (2012, methodology): “For instance by uplifting our multiplet Ψ to a full split SO(5) multiplet, like in a two site model, we could make the Higgs potential only logarithmically divergent, thus controlling its size in leading log approximation, and making the rough connection between MΨ and naturalness more explicit alon”