Thermal leptogenesis in minimal unified models

TL;DR

This paper reviews how thermal leptogenesis in minimal unified models like SU(5)×U(1) and SO(10) constrains their flavor structure and offers testable phenomenological predictions for explaining the universe's baryon asymmetry.

Contribution

It demonstrates that leptogenesis imposes significant constraints on the flavor structure of minimal unified models, linking cosmological baryon asymmetry to particle physics phenomenology.

Findings

Leptogenesis constrains flavor structures in minimal GUT models.

It provides testable predictions for baryon asymmetry.

The models successfully explain the universe's matter-antimatter imbalance.

Abstract

We review the status of thermal leptogenesis in the minimal $SU(5)\times U(1)$ and $SO(10)$ unified models under the assumption that the leptonic asymmetry generated in the out-of-equilibrium decays of heavy Majorana neutrinos (and its subsequent conversion into baryons via sphalerons) constitutes the primary source of baryon asymmetry of the Universe. In both cases, leptogenesis is shown to provide a strong extra constraint on the flavour structure of the model under consideration, leading to interesting and potentially testable phenomenological effects.