TL;DR
Leptogenesis explains the universe's matter-antimatter imbalance through lepton asymmetry generated by heavy neutrino decays, with recent advances emphasizing flavor physics and thermal effects.
Contribution
This paper reviews the foundational mechanisms of leptogenesis and highlights recent developments in finite temperature effects, spectator processes, and flavor physics.
Findings
Finite temperature effects significantly influence leptogenesis dynamics.
Spectator processes impact the evolution of lepton asymmetry.
Flavor physics plays a crucial role in leptogenesis models.
Abstract
Leptogenesis is a class of scenarios where the baryon asymmetry of the Universe is produced from a lepton asymmetry generated in the decays of a heavy sterile neutrino. We explain the motivation for leptogenesis. We review the basic mechanism, and describe subclasses of models. We then focus on recent developments in the understanding of leptogenesis: finite temperature effects, spectator processes, and in particular the significance of flavor physics.
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