A new, direct link between the baryon asymmetry and neutrino masses

2008/04/30 by Michele Frigerio, Pierre Hosteins, Stéphane Lavignac +2 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/j.nuclphysb.2008.07.015

published as Nucl.Phys.B806:84-102,2009 · 21 pages, 2 figures. v2: footnote and numerical exemple added in Section 4, comment added in the conclusions; typos corrected, references added

openalex publication_date 2008/07/25 · arxiv created 2008/09/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We point out that, in a class of SO(10) models with matter fields in 16 and 10 representations and type II realization of the seesaw mechanism, the light neutrino masses and the CP asymmetry needed for leptogenesis are controlled by one and the same set of couplings. The generated baryon asymmetry then directly depends on the low-energy neutrino parameters, with no unknown seesaw-scale flavour parameters involved; in particular, the necessary CP violation is provided by the CP-violating phases of the lepton mixing matrix. We compute the CP asymmetry in triplet decays for this scenario and show that it can lead to successful leptogenesis.

Citations

• Heavy particles from inflation
• Leptogenesis and neutrino oscillations within a predictive G(224)/SO(10) framework
• Probing the seesaw mechanism with neutrino data and leptogenesis
• Radiative fermion mass hierarchy in a nonsupersymmetric unified theory
• Resonant leptogenesis in a predictiveSO(10)grand unified model
• Big-bang nucleosynthesis and gravitinos
• Neutrino oscillations: present status and outlook
• On anomalous electroweak baryon-number non-conservation in the early universe

Cited by

• Leptogenesis in the Universe