A1 Journal article (refereed)
Electroweak baryogenesis from a dark sector (2017)

Cline, J. M., Kainulainen, K., & Tucker-Smith, D. (2017). Electroweak baryogenesis from a dark sector. Physical Review D, 95(11), Article 115006. https://doi.org/10.1103/PhysRevD.95.115006

JYU authors or editors

Publication details

All authors or editorsCline, James M.; Kainulainen, Kimmo; Tucker-Smith, David

Journal or seriesPhysical Review D



Publication year2017


Issue number11

Article number115006

PublisherAmerican Physical Society

Publication countryUnited States

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/54832


Adding an extra singlet scalar S to the Higgs sector can provide a barrier at tree level between a false vacuum with restored electroweak symmetry and the true one. This has been demonstrated to readily give a strong phase transition as required for electroweak baryogenesis. We show that with the addition of a fermionic dark matter particle χ coupling to S, a simple UV-complete model can realize successful electroweak baryogenesis. The dark matter gets a CP asymmetry that is transferred to the standard model through a CP portal interaction, which we take to be a coupling of χ to τ leptons and an inert Higgs doublet. The CP asymmetry induced in left-handed τ leptons biases sphalerons to produce the baryon asymmetry. The model has promising discovery potential at the LHC, while robustly providing a large enough baryon asymmetry and correct dark matter relic density with reasonable values of the couplings.

Keywordsstandard model of particle physicsdark matter

Contributing organizations

Ministry reportingYes

Reporting Year2017

JUFO rating2

Last updated on 2023-27-02 at 11:19