A1 Journal article (refereed)
Baryogenesis in the two doublet and inert singlet extension of the Standard Model (2016)

Alanne, T., Kainulainen, K., Tuominen, K., & Vaskonen, V. (2016). Baryogenesis in the two doublet and inert singlet extension of the Standard Model. Journal of Cosmology and Astroparticle Physics, 2016(8), Article 057. https://doi.org/10.1088/1475-7516/2016/08/057

JYU authors or editors

Publication details

All authors or editors: Alanne, Tommi; Kainulainen, Kimmo; Tuominen, Kimmo; Vaskonen, Ville

Journal or series: Journal of Cosmology and Astroparticle Physics

ISSN: 1475-7516

eISSN: 1475-7516

Publication year: 2016

Volume: 2016

Issue number: 8

Article number: 057

Publisher: Institute of Physics Publishing Ltd.; Scuola Internazionale Superiore di Studi Avanzati (SISSA)

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1088/1475-7516/2016/08/057

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/51399


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, Tn Lt Tc, which can significantly alter the usual phase-transition pattern in 2HD models with Tn ≈ Tc. 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.

Free keywords: extensions of the Standard Model; two-Higgs-doublet models; scalar fields; baryon asymmetry

Contributing organizations

Related projects

  • Dark Universe
      • Kainulainen, Kimmo
    • Research Council of Finland

Ministry reporting: Yes

Reporting Year: 2016

JUFO rating: 1

Last updated on 2023-03-10 at 15:19