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Area of Science:

  • Particle Physics
  • Cosmology
  • Neutrino Physics

Background:

  • The standard model of particle physics requires extension to incorporate neutrino masses.
  • Right-handed neutrinos are a common extension, but often require new mass scales.

Purpose of the Study:

  • To propose a mechanism for naturally generating neutrino mass within an extended standard model.
  • To explore implications of lepton number breaking at the Planck scale.

Main Methods:

  • Consideration of an extended standard model including right-handed neutrinos.
  • Analysis of plausible assumptions leading to lepton number breaking.

Main Results:

  • A neutrino mass of approximately 0.1 eV is naturally generated.
  • Lepton number breaking occurs at the Planck scale, possibly due to gravitational effects.
  • No new mass scales are introduced into the model.

Conclusions:

  • The proposed framework offers a natural explanation for observed neutrino masses.
  • The model provides a testable scenario for physics at the Planck scale.