(Quasi-)Degeneration, Quantum Corrections and Neutrino Mixing

TL;DR

This paper investigates how significant neutrino masses lead to notable quantum corrections in the PMNS matrix, emphasizing the universal nature of these effects across various new physics models, exemplified by the seesaw-extended MSSM.

Contribution

It demonstrates the universality of loop corrections to neutrino mixing from diverse new physics sectors, including non-minimal flavour violation scenarios.

Findings

Loop effects are universal across new physics models.

Non-decoupling effects are significant in the seesaw-extended MSSM.

Quantum corrections can substantially alter neutrino mixing parameters.

Abstract

In the case of neutrinos having significant masses to be measured in direct search, there are sizeable corrections to the PMNS matrix. We show the universality of loop effects from any new physics sector and discuss the seesaw-extended MSSM as an example of a non-minimal flavour violating theory with non-decoupling effects.