Amplification of Isocurvature Perturbations induced by Active-Sterile Neutrino Oscillations

Preprint

3 November 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9911214

Abstract

We show how the generation of a lepton number in the Early Universe induced by active-sterile neutrino oscillations, in presence of small baryon number inhomogeneities, gives rise to the formation of lepton domains, regions with different values of active neutrino chemical potential. The structure of these domains reflects the spectral features of the baryon number inhomogeneities that generated it. An interesting aspect of the mechanism is that the size of lepton domains can be super-horizon.

Keywords

STERILE NEUTRINO OSCILLATIONS
ISOCURVATURE PERTURBATIONS
ACTIVE STERILE NEUTRINO
PERTURBATIONS INDUCED
LEPTON

All Related Versions

Version 1, 1999-11-03, ArXiv
Published version: Physics Letters B, 482 (1-3), 150.

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