Leptogenesis and Yukawa textures

Abstract

We study a set of textures giving rise to correct masses and mixings of the charged fermions in the context of leptogenesis. The Dirac neutrino texture pattern is assumed to be identical with the up quark texture. The heavy Majonana neutrino mass matrix is obtained by inverting the type-I see-saw formula and using the neutrino masses and mixings required by the solar and atmospheric neutrino oscillation experiments as input. After making the feasibility study of the generated lepton asymmetry via the decay of the heavy right handed neutrino, we compute the generated baryon asymmetry by numerically solving the supersymmetric Boltzmann equations. We find for these models that both the hierarchy of the texture as well as the placement of the texture zeros are important to the viability of leptogenesis as the source of the observed baryon asymmetry of the universe.

Revised version, to appear in Phys. ReV. D

References in corpus (4)

• Heavy Majorana Neutrinos and Baryogenesis
• Baryon Asymmetry and Dark Matter
• Quark Lepton Mass Hierarchies and the Baryon Asymmetry
• Gravitino constraints on models of neutrino masses and leptogenesis

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