Right-handed neutrinos as the source of density perturbations
- 25 May 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 73 (10) , 103516
- https://doi.org/10.1103/physrevd.73.103516
Abstract
We study the possibility that cosmological density perturbations are generated by the inhomogeneous decay of right-handed neutrinos. This will occur if a scalar field whose fluctuations are created during inflation is coupled to the neutrino sector. Robust predictions of the model are a detectable level of non-Gaussianity and, if standard leptogenesis is the source of the baryon asymmetry, a baryon isocurvature perturbations at the level of the present experimental constraints.Keywords
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