Neutrinos and the matter-antimatter asymmetry in the Universe

TL;DR

This paper reviews how neutrino properties and leptogenesis could explain the matter-antimatter asymmetry in the Universe, linking particle physics with cosmology.

Contribution

It discusses the connection between neutrino masses, leptonic mixing, and the cosmological matter-antimatter asymmetry via leptogenesis, highlighting theoretical and cosmological implications.

Findings

Neutrino oscillations confirm nonzero neutrino masses.

The seesaw mechanism explains the smallness of neutrino masses.

Leptogenesis provides a viable framework for matter-antimatter asymmetry.

Abstract

The discovery of neutrino oscillations provides a solid evidence for nonzero neutrino masses and leptonic mixing. The fact that neutrino masses are so tiny constitutes a puzzling problem in particle physics. From the theoretical viewpoint, the smallness of neutrino masses can be elegantly explained through the seesaw mechanism. Another challenging issue for particle physics and cosmology is the explanation of the matter-antimatter asymmetry observed in Nature. Among the viable mechanisms, leptogenesis is a simple and well-motivated framework. In this talk we briefly review these aspects, making emphasis on the possibility of linking neutrino physics to the cosmological baryon asymmetry originated from leptogenesis.