2015/04/30 by Masahiro Ibe, Kunio Kaneta · 26 citations
Physics and Astronomy · #Asymmetry #Baryon asymmetry #CP violation #Dark Matter and Cosmic Phenomena #Double beta decay #Leptogenesis #Lepton #Lepton number #MAJORANA #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.92.035019
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 92(3) (American Physical Society) · 27 pages, 9 figures
arxiv created 2015/08/23 · openalex publication_date 2015/08/27 · arxiv updated 2015/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A novel model of spontaneous leptogenesis is investigated, where leptogenesis takes place in the thermal equilibrium due to a background Nambu-Goldstone field in motion. In particular, we identify the Nambu-Goldstone field to be the Majoron which associates with spontaneous breakdown of (discrete) B\ensuremath-L symmetry. In this scenario sufficient lepton number asymmetry is generated in a primordial thermal bath without having CP-violating out-of-equilibrium decay of the heavy right-handed Majorana neutrinos. To obtain the observed baryon asymmetry, the neutrino masses are predicted in certain ranges, which can be translated into the effective mass of the neutrinoless double beta decay.