Flavour Mixing of Neutrinos and Baryon Asymmetry of the Universe

Abstract

We investigate baryogenesis in the $\nu$MSM, which is the Minimal Standard Model (MSM) extended by three right-handed neutrinos with Majorana masses smaller than the weak scale. In this model the baryon asymmetry of the universe (BAU) is generated via flavour oscillation between right-handed neutrinos. We consider the case when BAU is solely originated from the CP violation in the mixing matrix of active neutrinos. We perform analytical and numerical estimations of the yield of BAU, and show how BAU depends on mixing angles and CP violating phases. It is found that the asymmetry in the inverted hierarchy for neutrino masses receives a suppression factor of about 4% comparing with the normal hierarchy case. It is, however, pointed out that, when ${\theta }_{13}=0$ and ${\theta }_{23}=\pi /4$, baryogenesis in the normal hierarchy becomes ineffective, and hence the inverted hierarchy case becomes significant to account for the present BAU.

15 pages, 7 figures

References in corpus (11)

• Sterile neutrinos: the dark side of the light fermions
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• How to find neutral leptons of the nuMSM?
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• The nuMSM, leptonic asymmetries, and properties of singlet fermions
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• Light inflaton Hunter's Guide
• Coherent Active-Sterile Neutrino Flavor Transformation in the Early Universe
• Delayed pulsar kicks from the emission of sterile neutrinos
• Inflaton mass in the nuMSM inflation
• Sterile neutrino dark matter in warped extra dimensions

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