Leptogenesis and Neutrino Oscillations Within A Predictive G(224)/SO(10)-Framework

Abstract

A framework based on an effective symmetry that is either G(224)= SU(2)_L x SU(2)_R xSU(4)^c or SO(10) has been proposed (a few years ago) that successfully describes the masses and mixings of all fermions including neutrinos, with seven predictions, in good accord with the data. Baryogenesis via leptogenesis is considered within this framework by allowing for natural phases (~ 1/20-1/2) in the entries of the Dirac and Majorana mass-matrices. It is shown that the framework leads quite naturally, for both thermal as well as non-thermal leptogenesis, to the desired magnitude for the baryon asymmetry. This result is obtained in full accord with the observed features of the atmospheric and solar neutrino oscillations, as well as with those of the quark and charged lepton masses and mixings, and the gravitino-constraint. Hereby one obtains a unified description of fermion masses, neutrino oscillations and baryogenesis (via leptogenesis) within a single predictive framework.

Efficiency factor updated, some clarifications and new references added. 19 pages

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Cited by in corpus (29)

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• Inflation With Realistic Supersymmetric SO(10)
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• A new, direct link between the baryon asymmetry and neutrino masses
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• Lepton Flavor Violation within a realistic SO(10)/G(224) Framework
• Leptonic CP violation phases using an ansatz for the neutrino mass matrix and application to leptogenesis
• Tying in CP and Flavor Violations with Fermion Masses and Neutrino Oscillations
• Inflationary Cosmology with Five Dimensional SO(10)
• $\delta T/T$ and Neutrino Masses in SU(5)
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• Neutrino Masses: Shedding Light on Unification and Our Origin
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• Distinguishing Between Hierarchical and Lop-sided SO(10) Models
• Spontaneous SU(2) symmetry violation in the $SU(2{)}_L\times SU(2{)}_R\times SU(4)$ electroweak model
• Grand Unification as a Bridge Between String Theory and Phenomenology