Renormalization group evolution of neutrino masses and mixing in seesaw models: A review

TL;DR

This review discusses how neutrino masses and mixing parameters evolve across energy scales in various seesaw models, highlighting the impact of heavy fields decoupling on low-energy neutrino phenomenology.

Contribution

It provides a comprehensive overview of the renormalization group evolution of neutrino parameters in seesaw models, integrating high and low energy perspectives.

Findings

Neutrino masses are generated at high energy scales via seesaw mechanisms.

Heavy seesaw fields decouple sequentially, affecting low-energy effective theories.

Renormalization group evolution significantly impacts neutrino mixing parameters.

Abstract

We consider different extensions of the standard model which can give rise to the small active neutrino masses through seesaw mechanisms, and their mixing. These tiny neutrino masses are generated at some high energy scale by the heavy seesaw fields which then get sequentially decoupled to give an effective dimension-5 operator. The renormalization group evolution of the masses and the mixing parameters of the three active neutrinos in the high energy as well as the low energy effective theory is reviewed in this article.