Primordial Dirac leptogenesis
Abstract
We present a novel realization of Dirac leptogenesis based on the postinflationary reheating phase of the early Universe. An asymmetry generated within the scalar sector via C P -violating and out-of-equilibrium inflaton decays is transferred to chiral neutrinos through Yukawa interactions and then to baryons via electroweak sphalerons. We describe in detail a minimal realization of this mechanism that naturally accommodates small neutrino Yukawa couplings and results in contributions to the effective number of relativistic species, N eff , testable in upcoming cosmological observations.
Fields of Study & Subjects
Quasicrystal Structures and Properties
Algebraic and Geometric Analysis
Homotopy and Cohomology in Algebraic Topology
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 11
- Publication date
- 11 May 2026
- Language
- EN