Slepton Flavour Mixing and Neutrino Masses

TL;DR

This paper explores how slepton flavor mixing can significantly influence neutrino masses and mixing angles, potentially surpassing traditional tau Yukawa effects, and offers a new perspective on neutrino mass generation mechanisms.

Contribution

It introduces the idea that slepton flavor violation can dominate neutrino mass contributions, providing an alternative to standard renormalization group evolution effects.

Findings

Slepton flavor mixing can significantly impact neutrino mass and mixing.

The resulting mixing angles differ from fixed point solutions of RG equations.

Neutrino mass splittings can be generated through slepton exchange effects.

Abstract

It is pointed out that important contribution to neutrino masses and mixing can come from flavour violating slepton exchange. For low and intermediate $\tan\beta$ such effects can dominate over the usual tau Yukawa coupling effects included in the renormalization group evolution. The mixing angles satisfy then the relation different from the fixed point solution of the renormalization group equation, and the desired neutrino mass splitting can be generated.