| Published Articles | |
| Report number | arXiv:1702.08909 ; CERN-TH-2017-050 |
| Title | Electroweak baryogenesis from a dark sector |
| Related title | Electroweak baryogenesis from a dark sector |
| Author(s) | Cline, James M. (CERN ; McGill U.) ; Kainulainen, Kimmo (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Tucker-Smith, David (Williams Coll.) |
| Publication | 2017-06-07 |
| Imprint | 2017-02-28 |
| Number of pages | 16 |
| Note | 16 pages, 15 figures; v2: added references; v3: corrected eq.7, improved treatment of nucleation and wall velocity, added section on indirect detection; published version |
| In: | Phys. Rev. D 95 (2017) 115006 |
| DOI | 10.1103/PhysRevD.95.115006 |
| Subject category | astro-ph.CO ; Astrophysics and Astronomy ; hep-ph ; Particle Physics - Phenomenology |
| 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 $\chi$ 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 $\chi$ to $\tau$ leptons and an inert Higgs doublet. The CP asymmetry induced in left-handed $\tau$ 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. |
| Copyright/License | arXiv nonexclusive-distrib. 1.0 Preprint: © 2017-2025 CERN (License: CC-BY-4.0) |
Corresponding record in: Inspire
レコード 生成： 2017-03-10, 最終変更： 2023-03-12
PDF