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

ISSN2470-0010

eISSN2470-0029

Publication year2017

Volume95

Issue number11

Article number115006

PublisherAmerican Physical Society

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevD.95.115006

Publication open accessOpenly available

Publication channel open accessPartially open access channel

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


Abstract

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