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Naturally small Dirac neutrino masses in supergravity

Steven Abel1, Athanasios Dedes1, and Kyriakos Tamvakis2

  • 1Institute for Particle Physics Phenomenology (IPPP), Durham DH1 3LE, United Kingdom
  • 2Physics Department, University of Ioannina, GR 451 10, Ioannina, Greece

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Phys. Rev. D 71, 033003 – Published 17 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.033003

Abstract

We show that Dirac neutrino masses of the right size can arise from the Kähler potential of supergravity. They are proportional to the supersymmetry and the electroweak breaking scales. We find that they have the experimentally observed value provided that the ultraviolet cutoff of the Minimal Supersymmetric Standard Model is between the Grand Unification scale and the heterotic string scale. If lepton number is not conserved, then relatively suppressed Majorana masses can also be present, resulting in pseudo-Dirac neutrino masses.

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Phys. Rev. D 71, 033003– Published 17 February, 2005
  • Received 3 March 2004

© 2005 American Physical Society

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