Search

We investigate nonresonant thermal leptogenesis in the context of the SU(5)×T13 "asymmetric texture", where both Dirac and Majorana CP violation arise from a single phase in the tribimaximal seesaw mixing matrix. We show that the baryon asymmetry of the universe can be explained in this model only when flavor effects are considered for right-handed neutrino masses of O(1011-1012)  GeV. The sign of the baryon asymmetry also determines the sign of the previouslyWe investigate nonresonant thermal leptogenesis in the context of the SU(5)×T13 "asymmetric texture", where both Dirac and Majorana CP violation arise from a single phase in the tribimaximal seesaw mixing matrix. We show that the baryon asymmetry of the universe can be explained in this model only when flavor effects are considered for right-handed neutrino masses of O(1011-1012)  GeV. The sign of the baryon asymmetry also determines the sign of the previously predicted Dirac CP phase |δCP|=1.32π, consistent with the latest global fit δCPPDG=1.37±0.17π. [ABSTRACT FROM AUTHOR]

We extend the recently proposed SU(5)×T13 model for the asymmetric texture to the up-type quark and seesaw sectors. The hierarchical up-type quark masses are generated from higher-dimensional operators involving family-singlet Higgses, gauge-singlet familons, and vectorlike messengers. The complex-tribimaximal seesaw mixing arises from the vacuum structure of a minimal number of familons, resulting in an alignment between the Yukawa and Majorana matrices of the seesaw formula. Introducing four right-handed neutrinos, normal ordering of the light neutrino masses is obtained, with mν1=27.6  meV, mν2=28.9  meV and mν3=57.8  meV. Their sum almost saturates Planck's cosmological upper bound (120 meV). The right-handed neutrino masses are expressed in terms of two parameters for a particular choice of familon vacuum alignment. We predict the CP Jarlskog-Greenberg invariant to be |J|=0.028, consistent with the current Particle Data Group (PDG) estimate, and Majorana invariants |I1|=0.106 and |I2|=0.011. A sign ambiguity in the model parameters leads to two possibilities for the invariant mass parameter |mββ|: 13.02 or 25.21 meV, both within an order of magnitude of the most rigorous experimental upper limit (61-165 meV). [ABSTRACT FROM AUTHOR]

We propose T13=Z13⋊Z3 as the underlying non-Abelian discrete family symmetry of the asymmetric texture presented in [M. H. Rahat, P. Ramond, and B. Xu, Phys. Rev. D 98, 055030 (2018).]. Its mod 13 arithmetic distinguishes each Yukawa matrix element of the texture. We construct a model of effective interactions that singles out the asymmetry and equates, without fine-tuning, the products of down-quark and charged-lepton masses at a GUT-like scale. [ABSTRACT FROM AUTHOR]

We propose T13=Z13⋊Z3 as the underlying non-Abelian discrete family symmetry of the asymmetric texture presented in [M. H. Rahat, P. Ramond, and B. Xu, Phys. Rev. D 98, 055030 (2018).]. Its mod 13 arithmetic distinguishes each Yukawa matrix element of the texture. We construct a model of effective interactions that singles out the asymmetry and equates, without fine-tuning, the products of down-quark and charged-lepton masses at a GUT-like scale. [ABSTRACT FROM AUTHOR]