Right-handed neutrinos as the source of density perturbations

Details Right-handed neutrinos as the source of density perturbations Right-handed neutrinos as the source of density perturbations

2006-02-06

arxiv.org/abs/hep-ph/0602052v1

Phys.Rev. D73 (2006) 103516

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures

Scientific paper

10.1103/PhysRevD.73.103516

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.

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