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.

19 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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Cited by in corpus (7)

• The minimal seesaw and leptogenesis models
• Scalar-singlet assisted leptogenesis with CP violation from the vacuum
• New approach to neutrino masses and leptogenesis with Occam's razor
• Renormalization group evolution induced leptogenesis in the minimal seesaw model with the trimaximal mixing and mu-tau reflection symmetry
• Simiplified textures of the seesaw model for the trimaximal neutrino mixings
• Generalised Proper Time as a Unifying Basis for Models with Two Right-Handed Neutrinos
• $\mu$-$\tau$ symmetry breaking and CP violation in the neutrino mass matrix