Fermion masses, Leptogenesis and Supersymmetric SO(10) Unification

Abstract

Current neutrino oscillation data indicate the existence of two large lepton mixing angles, while Kobayashi-Maskawa matrix elements are all small. Here we show how supersymmetric SO(10) with extra chiral singlets can easily reconcile large lepton mixing angles with small quark mixing angles within the framework of the successful Fritzsch ansatz. Moreover we show how this is fully consistent with the thermal leptogenesis scenario, avoiding the so-called gravitino problem. A sizeable asymmetry can be generated at relatively low scales. We present our results in terms of the leptonic CP violation parameter that characterizes neutrino oscillations.

18 pages, 9 figures, 1 table, new section discussing washout factor added, matches version published in Phys. Rev. D

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Cited by in corpus (9)

• Leptogenesis
• CP Violation and Neutrino Oscillations
• Successful Leptogenesis in SO(10) Unification with a Left-Right Symmetric Seesaw Mechanism
• A new, direct link between the baryon asymmetry and neutrino masses
• Inverse see-saw, leptogenesis, observable proton decay and ${\Delta }_{\mathrm{R}}^{\pm \pm }$ in SUSY SO(10) with heavy W_R
• Leptogenesis in $E_6\times U(1{)}_A$ SUSY GUT model
• Patterns in the Fermion Mixing Matrix, a bottom-up approach
• Supersymmetric Models for Neutrino Mass
• Neutrinos as cosmic messengers