6533b835fe1ef96bd129ea5b
RESEARCH PRODUCT
Baryogenesis in the two doublet and inert singlet extension of the Standard Model
Kimmo KainulainenKimmo KainulainenVille VaskonenVille VaskonenTommi AlanneKimmo TuominenKimmo Tuominensubject
Phase transitionCosmology and Nongalactic Astrophysics (astro-ph.CO)Dark matterFOS: Physical sciences7. Clean energy01 natural sciencesMolecular physicsStandard ModelHigh Energy Physics - Phenomenology (hep-ph)Baryon asymmetry0103 physical sciencescosmological phase transitionstwo-Higgs-doublet modelsSinglet state010306 general physicsPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyAstronomy and Astrophysicsextensions of the Standard ModelBaryogenesisHigh Energy Physics - Phenomenologyscalar fieldsHiggs bosonbaryon asymmetryScalar fieldAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We investigate an extension of the Standard Model containing two Higgs doublets and a singlet scalar field (2HDSM). We show that the model can have a strongly first-order phase transition and give rise to the observed baryon asymmetry of the Universe, consistent with all experimental constraints. In particular, the constraints from the electron and neutron electric dipole moments are less constraining here than in pure two-Higgs-doublet model (2HDM). The two-step, first-order transition in 2HDSM, induced by the singlet field, may lead to strong supercooling and low nucleation temperatures in comparison with the critical temperature, $T_n \ll T_c$, which can significantly alter the usual phase-transition pattern in 2HD models with $T_n \approx T_c$. Furthermore, the singlet field can be the dark matter particle. However, in models with a strong first-order transition its abundance is typically but a thousandth of the observed dark matter abundance.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-08-25 |