We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Second leptogenesis: Unraveling the baryon-lepton asymmetry discrepancy.
- Authors
ChoeJo, YeolLin; Enomoto, Kazuki; Kim, Yechan; Lee, Hye-Sung
- Abstract
We propose a novel scenario to explain the matter-antimatter asymmetry by twofold leptogenesis, wherein heavy Majorana neutrinos exhibit temperature-dependent masses and engage in CP-violating decays. This scenario envisages two distinct phases of leptogenesis: one occurring above the electroweak scale and the other below it. The sphaleron process converts the first lepton asymmetry to baryon asymmetry, but not the second one due to its decoupling. This mechanism potentially explains the significant discrepancy between baryon and lepton asymmetries, as suggested by recent observations of Helium-4. Furthermore, our model implies that the present masses of Majorana neutrinos are lighter than the electroweak scale, offering a tangible avenue for experimental verification in various terrestrial settings.
- Subjects
ELECTROWEAK interactions; NEUTRINO mass; ANTIMATTER; STERILE neutrinos; NEUTRINOS
- Publication
Journal of High Energy Physics, 2024, Vol 2024, Issue 3, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP03(2024)003