2003/01/31 by Rouzbeh Allahverdi, Bhaskar Dutta, Anupam Mazumdar +1 · 2 citations
Physics and Astronomy · #Asymmetry #Baryon asymmetry #Cosmology and Gravitation Theories #Electron #Inflation (cosmology) #Inflaton #Lepton #MAJORANA #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Theoretical physics #Yukawa potential #hep-ph
paper · pdf · doi:10.1103/physrevd.67.123515
published as Phys.Rev. D67 (2003) 123515 · 7 revtex pages, 2 figures (uses axodraw). Minor changes for better clarification and updated references. Final version to appear in Phys. Rev. D
arxiv created 2003/06/04 · openalex publication_date 2003/06/20 · arxiv updated 2009/11/30 · openalex created_date 2022/05/12 · openalex updated_date 2026/08/05
We propose that the observed baryon asymmetry of the Universe can naturally arise from a net asymmetry generated in the right-handed sneutrino sector at fairly low reheat temperatures. The initial asymmetry in the sneutrino sector is produced from the decay of the inflaton, and is subsequently transferred into the standard model (s)lepton doublet via three-body decay of the sneutrino. Our scenario relies on two main assumptions: a considerable branching ratio for the inflaton decay to the right-handed (s)neutrinos, and Majorana masses which are generated by the Higgs mechanism. The marked feature of this scenario is that the lepton asymmetry is decoupled from the neutrino Dirac Yukawa couplings. We exhibit that our scenario can be embedded within minimal models which seek the origin of a tiny mass for neutrinos.