A Z3-symmetric Type-III seesaw model uses radiative Coleman-Weinberg effects to lift vacuum degeneracy and annihilate domain walls, fitting neutrino data, generating baryon asymmetry via leptogenesis at 10^9 GeV triplet masses, and predicting detectable gravitational waves.
Leptogenesis in the type III seesaw mechanism
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abstract
It is shown that the type III seesaw mechanism proposed recently can have certain advantages over the conventional (or type I) seesaw mechanism for leptogenesis. In particular a resonant enhancement of leptogenesis via heavy quasi-Dirac right-handed neutrino pairs can occur without a special flavor form or "texture" of the mass matrices being assumed. Some of the requirements for neutrino mixing and leptogenesis are effectively decoupled.
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Fixed points of modular symmetry in a type III seesaw model produce viable neutrino phenomenology and the observed baryon asymmetry.
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Radiative Lifting of $\mathbb{Z}_3$ Domain-Wall Degeneracy in a Type-III Seesaw Model: Implications for Leptogenesis and Gravitational Waves
A Z3-symmetric Type-III seesaw model uses radiative Coleman-Weinberg effects to lift vacuum degeneracy and annihilate domain walls, fitting neutrino data, generating baryon asymmetry via leptogenesis at 10^9 GeV triplet masses, and predicting detectable gravitational waves.
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Predictions of Modular Symmetry Fixed Points on Neutrino Masses, Mixing, and Leptogenesis
Fixed points of modular symmetry in a type III seesaw model produce viable neutrino phenomenology and the observed baryon asymmetry.