Electroweak baryogenesis in non-minimal composite Higgs models
- ICREA, Instituciò Catalana de Recerca i Estudis Avançats, Barcelona (Spain)
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
- CERN PH-TH, Geneva 23, 1211 Switzerland (Switzerland)
- IFAE, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona (Spain)
We address electroweak baryogenesis in the context of composite Higgs models, pointing out that modifications to the Higgs and top quark sectors can play an important rôle in generating the baryon asymmetry. Our main observation is that composite Higgs models that include a light, gauge singlet scalar in the spectrum [as in the model based on the symmetry breaking pattern SO(6) → SO(5)], provide all necessary ingredients for viable baryogenesis. In particular, the singlet leads to a strongly first-order electroweak phase transition and introduces new sources of CP violation in dimension-five operators involving the top quark. We discuss the amount of baryon asymmetry produced and the experimental constraints on the model.
- OSTI ID:
- 22279720
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 01 Vol. 2012; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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