2010/12/31 by Chee Sheng Fong, M. C. González-García, M. C. Gonzalez-Garcia +1 · 18 citations
Physics and Astronomy · #Asymmetry #Baryogenesis #Baryon asymmetry #CP violation #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electron #Electroweak interaction #Leptogenesis #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #hep-ph
paper · pdf · doi:10.1088/1475-7516/2011/02/032
published in Journal of Cosmology and Astroparticle Physics 2011(02), 032 (Institute of Physics) · 41 pages, 5 figures, added 4 references
openalex publication_date 2011/02/25 · arxiv created 2011/02/26 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss the effective theory appropriate for studying soft leptogenesis at temperatures T ≳10 7 GeV. In this regime, the main source of the B − L asymmetry is the CP asymmetry of a new anomalous R -charge that couples to generalized anomalous electroweak processes. Baryogenesis thus occurs mainly through R -genesis, and with an efficiency that can be up to two orders of magnitude larger than in usual estimates. Contrary to common belief, a sizeable baryon asymmetry is generated also when thermal corrections to the CP asymmetries in sneutrino decays are neglected which, in soft leptogenesis, implies vanishing lepton-flavour CP asymmetries. We present general Boltzmann equations for soft leptogenesis that are valid in all temperature regimes.