Flavour-conserving oscillations of Dirac-Majorana neutrinos

Abstract

We analyze both chirality-changing and chirality-preserving transitions of Dirac-Majorana neutrinos. In vacuum, the first ones are suppressed with respect to the others due to helicity conservation and the interactions with a (``normal'') medium practically does not affect the expressions of the probabilities for these transitions, even if the amplitudes of oscillations slightly change. For usual situations involving relativistic neutrinos we find no resonant enhancement for all flavour-conserving transitions. However, for very light neutrinos propagating in superdense media, the pattern of oscillations ${\nu }_L\to {\nu }_L^C$ is dramatically altered with respect to the vacuum case, the transition probability practically vanishing. An application of this result is envisaged.

14 pages, latex 2E, no figures

References in corpus (1)

• Pontecorvo neutrino-antineutrino oscillations: theory and experimental limits

Cited by in corpus (4)

• Quantization of eletric charge, the neutrino and generation nonuniversality
• Parity Violation and Chiral Oscillation of Cosmological Relic Neutrinos
• Chiral oscillations in the non-relativistic regime
• 'Majorana mass' fermions as untrue Majorana particles, rather endowed with pseudoscalar-type charges than genuinely neutral