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Neutrino Masses from Planck-Scale Lepton Number Breaking
Alejandro Ibarra1,2, Patrick Strobl1, Takashi Toma1
1Physik-Department, Technische Universität München, James-Franck-Straße, 85748 Garching, Germany.
This study introduces right-handed neutrinos to the standard model, naturally generating neutrino mass around 0.1 eV through lepton number breaking at the Planck scale, potentially via gravity. No new mass scales are required.
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.
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