Right-handed neutrinos as the source of density perturbations

2006/02/06 by Lotfi Boubekeur, Paolo Creminelli · 1 citation
Physics and Astronomy · #Asymmetry #Baryogenesis #Baryon #Baryon asymmetry #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Inflation (cosmology) #Leptogenesis #Lepton #Neutrino #Non-Gaussianity #Nuclear physics #Particle physics #Physics #Quantum mechanics #Right handed #Theoretical physics #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.73.103516

published as Phys.Rev. D73 (2006) 103516 · 14 pages, 2 figures

arxiv created 2006/02/06 · openalex publication_date 2006/05/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Probing String Theory with Modulated Cosmological Fluctuations
• Baryogenesis through leptogenesis
• Cosmological perturbations from inhomogeneous reheating, freeze-out, and mass domination
• The shape of non-Gaussianities
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Flavor dependence ofCPasymmetries and thermal leptogenesis with strong right-handed neutrino mass hierarchy

Cited by

• Non-Gaussianity and baryonic isocurvature fluctuations in the curvaton scenario