Light sterile neutrino and leptogenesis
arXiv:2205.13860 · doi:10.1007/s40042-022-00674-w
Abstract
We studied models of leptogenesis where three right-handed Majorana neutrinos are involved and the minimal-extended seesaw mechanism including an additional singlet field produces four light neutrinos. This study shows that the type of mass ordering and heavy Majorana scales can be determined by inputting the simplest orthogonal matrix into the Casas-Ibarra(CI) representation of seesaw. The CP asymmetry produced from the decays of heavy neutrinos and the dilution mass are predicted in terms of the mass and mixing elements of the fourth neutrino. Upon the choice of CI matrix, the existence of a light sterile neutrino is required to explain the high-energy lepton asymmetry in light of phenomenological measurements. Although there are several free parameters attributable to an additional neutrino, the model can be in part constrained by low-energy experiments such as sterile neutrino searches and neutrinoless double-beta decays, as well as the observed baryon asymmetry in the universe.
23 pages, 7 figures
References in corpus (11)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- The fate of hints: updated global analysis of three-flavor neutrino oscillations
- 2020 Global reassessment of the neutrino oscillation picture
- Flavour Matters in Leptogenesis
- Sterile neutrino search at NEOS Experiment
- Light Sterile Neutrinos: Models and Phenomenology
- The minimal seesaw and leptogenesis models
- Calorimeter development for the SuperNEMO double beta decay experiment
- Seesaw Scale and CP Phases in a Minimal Model of Leptogenesis
- Leptogenesis and eV scale sterile neutrino