Baryogenesis in the two doublet and inert singlet extension of the Standard Model
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
Published inJournal of Cosmology and Astroparticle Physics
© the Authors, 2016. This is an open access article published by IoP and distributed under the terms of a Creative Commons License. Article funded by SCOAP3.
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.
PublisherInstitute of Physics Publishing Ltd.; Scuola Internazionale Superiore di Studi Avanzati (SISSA)
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Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThis work was financially supported by the Academy of Finland projects 278722 and 267842. The CP3 -Origins centre is partially funded by the Danish National Research Foundation, grant number DNRF90. VV is supported by the Magnus Ehrnrooth foundation. TA acknowledges partial funding from a Villum foundation grant.
Except where otherwise noted, this item's license is described as © the Authors, 2016. This is an open access article published by IoP and distributed under the terms of a Creative Commons License. Article funded by SCOAP3.
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