Renormalization group evolution induced leptogenesis in the minimal seesaw model with the trimaximal mixing and mu-tau reflection symmetry

Abstract

In this paper, we consider the imbedding of the popular and well-motivated trimaximal mixing and $\mu$-$\tau$ reflection symmetry (which can help us shape the forms of the neutrino mass matrix) in the minimal seesaw model (which contains much fewer parameters than the general seesaw model) with two TeV-scale right-handed neutrinos (for realizing a low-scale seesaw) of nearly degenerate masses (for realizing a resonant leptogenesis). However, either for the trimaximal mixing scenario (which is realized through the Form Dominance approach here) or for the $\mu$-$\tau$ reflection symmetry scenario, leptogenesis cannot proceed. To address this issue, we consider the possibility that the special forms of the neutrino mass matrix for the trimaximal mixing and $\mu$-$\tau$ reflection symmetry are slightly broken by the renormalization group evolution effect, thus allowing leptogenesis to proceed. It is found that in the normal case of the neutrino mass ordering, the baryon asymmetry thus generated can reproduce the observed value. For completeness, we have also extended our analysis to the scenario that two right-handed neutrinos are not nearly degenerate any more. Unfortunately, in this scenario the final baryon asymmetry is smaller than the observed value by several orders of magnitude.

25 pages, 4 figures, version to appear in JHEP

References in corpus (13)

• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Leptogenesis
• 2020 Global reassessment of the neutrino oscillation picture
• Possible Alternatives to Tri-bimaximal Mixing
• Comparing Trimaximal Mixing and Its Variants with Deviations from Tri-bimaximal Mixing
• Minimal Modification To The Tri-bimaximal Neutrino Mixing
• Tri-bimaximal Neutrino Mixing and Flavor-dependent Resonant Leptogenesis
• The minimal seesaw and leptogenesis models
• Neutrino mu-tau reflection symmetry and its breaking in the minimal seesaw
• Towards the minimal seesaw model via CP violation of neutrinos
• Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model
• Bridging resonant leptogenesis and low-energy CP violation with an RGE-modified seesaw relation
• A direct link between unflavored leptogenesis and low-energy CP violation via the one-loop quantum corrections

Cited by in corpus (3)

• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• Identifying a minimal flavor symmetry of the seesaw mechanism behind neutrino oscillations
• The translational $\mu$-$\tau$ reflection symmetry of Majorana neutrinos