Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model

Abstract

We discuss the correlation between the CP violating Dirac phase of the lepton mixing matrix and the cosmological baryon asymmetry based on the leptogenesis in the minimal seesaw model with two right-handed Majorana neutrinos and the trimaximal mixing for neutrino flavors. The sign of the CP violating Dirac phase at low energy is fixed by the observed cosmological baryon asymmetry since there is only one phase parameter in the model. According to the recent T2K and NO$\nu$A data of the CP violation, the Dirac neutrino mass matrix of our model is fixed only for the normal hierarchy of neutrino masses.

arXiv comment19 pages, 4 figures, 1 table. 1 reference is added in this version. arXiv admin note: text overlap with arXiv:1709.02136

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• The minimal seesaw and leptogenesis models
• Leptogenesis from Low Energy $CP$ Violation
• Type-I Seesaw as the Common Origin of Neutrino Mass, Baryon Asymmetry, and the Electroweak Scale
• The minimal type-I seesaw model with maximally-restricted texture zeros
• Lepton Mixing Predictions from $S_4$ in the Tri-Direct CP approach to Two Right-handed Neutrino Models
• Consequences of minimal seesaw with complex $\mu \tau$ antisymmetry of neutrinos
• Scalar-singlet assisted leptogenesis with CP violation from the vacuum
• New approach to neutrino masses and leptogenesis with Occam's razor
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• Generalised Proper Time as a Unifying Basis for Models with Two Right-Handed Neutrinos
• Simiplified textures of the seesaw model for the trimaximal neutrino mixings
• Further study on the textures of neutrino mass matrix for maximal atmospherical mixing angle and Dirac CP phase
• $\mu$-$\tau$ symmetry breaking and CP violation in the neutrino mass matrix
• Towards the minimal seesaw model for the prediction of neutrino CP violation