Baryogenesis in the two doublet and inert singlet extension of the Standard Model

Abstract

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.

25 pages, 8 figures; minor changes to match the published version

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• Gauge-independent Renormalization of the N2HDM
• Wrong sign Yukawa coupling of the 2HDM plus a singlet scalar dark matter confronted with dark matter and Higgs data
• Irreducible cosmological backgrounds of a real scalar with a broken symmetry
• Bubble Trouble: a Review on Electroweak Baryogenesis
• Electroweak Phase Transition in Two Scalar Singlet Model with pNGB Dark Matter
• Phenomenology of the dark matter sector in the 2HDM extended with complex scalar singlet
• A Scotogenic Model as a Prototype for Leptogenesis with One Single Gauge Singlet
• Simulations of a bubble wall interacting with an electroweak plasma
• Vacuum Stability Conditions and Potential Minima for a Matrix Representation in Lightcone Orbit Space