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Title: Electroweak baryogenesis in non-minimal composite Higgs models

Abstract

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.

Authors:
 [1];  [2];  [3];  [4]
  1. ICREA, Instituciò Catalana de Recerca i Estudis Avançats, Barcelona (Spain)
  2. Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
  3. CERN PH-TH, Geneva 23, 1211 Switzerland (Switzerland)
  4. IFAE, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona (Spain)
Publication Date:
OSTI Identifier:
22279720
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; ASYMMETRY; BARYONS; COSMOLOGY; CP INVARIANCE; FIELD OPERATORS; HIGGS BOSONS; HIGGS MODEL; PHASE TRANSFORMATIONS; SCALARS; SO-5 GROUPS; SO-6 GROUPS; SYMMETRY BREAKING; T QUARKS

Citation Formats

Espinosa, José R., Gripaios, Ben, Konstandin, Thomas, and Riva, Francesco. Electroweak baryogenesis in non-minimal composite Higgs models. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/01/012.
Espinosa, José R., Gripaios, Ben, Konstandin, Thomas, & Riva, Francesco. Electroweak baryogenesis in non-minimal composite Higgs models. United States. https://doi.org/10.1088/1475-7516/2012/01/012
Espinosa, José R., Gripaios, Ben, Konstandin, Thomas, and Riva, Francesco. Sun . "Electroweak baryogenesis in non-minimal composite Higgs models". United States. https://doi.org/10.1088/1475-7516/2012/01/012.
@article{osti_22279720,
title = {Electroweak baryogenesis in non-minimal composite Higgs models},
author = {Espinosa, José R. and Gripaios, Ben and Konstandin, Thomas and Riva, Francesco},
abstractNote = {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.},
doi = {10.1088/1475-7516/2012/01/012},
url = {https://www.osti.gov/biblio/22279720}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2012,
place = {United States},
year = {2012},
month = {1}
}