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 editors: Cline, James M.; Kainulainen, Kimmo; Tucker-Smith, David

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2017

Volume: 95

Issue number: 11

Article number: 115006

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.95.115006

Publication open access: Openly available

Publication channel open access: Partially 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.

Keywords: standard model of particle physics; dark matter

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2017

JUFO rating: 2