Particle-antiparticle perturbation superhorizon crossing: baryogenesis, leptogenesis, magnetogenesis and darkogenesis

Abstract

During the reheating epoch, gravitationally produced superheavy particle-antiparticle pairs undergo quantum oscillations. Perturbations in their relative densities cross out the horizon, leading to an asymmetry of particles and antiparticles inside the horizon. Massive particles decay into light baryons and leptons, thereby explaining baryogenesis and leptogenesis, whose charged components must generate a nontrivial electric current, thereby producing a primordial magnetic field (magnetogenesis). As a result, the baryon (lepton) number-to-entropy ratio and the primordial magnetic field bound are consistent with observational data. We also discuss darkogenesis, the origin of dark matter and anti-dark matter asymmetry.

Comments: 22 pages, the article follows "Particle-antiparticle oscillation modes crossing horizon: Baryogenesis and dark-matter waves'', Nucl. Phys. B 1014 (2025) 116875, arXiv:2007.03464