Renormalization group running of neutrino parameters in the inverse seesaw model

TL;DR

This paper analyzes how neutrino parameters evolve with energy in the inverse seesaw model, revealing significant effects near the electroweak scale that could be tested at colliders like the LHC.

Contribution

It provides compact analytical formulas for neutrino parameter running in the inverse seesaw model within the SM and MSSM frameworks, highlighting potential observable effects.

Findings

Large Yukawa corrections cause significant mixing angle running.

Degenerate neutrino masses enhance running effects.

Seesaw threshold effects are discussed and compared to other models.

Abstract

We perform a detailed study of the renormalization group equations in the inverse seesaw model. Especially, we derive compact analytical formulas for the running of the neutrino parameters in the standard model and the minimal supersymmetric standard model, and illustrate that, due to large Yukawa coupling corrections, significant running effects on the leptonic mixing angles can be naturally obtained in the proximity of the electroweak scale, perhaps even within the reach of the LHC. In general, if the mass spectrum of the light neutrinos is nearly degenerate, the running effects are enhanced to experimentally accessible levels, well suitable for the investigation of the underlying dynamics behind the neutrino mass generation and the lepton flavor structure. In addition, the effects of the seesaw thresholds are discussed, and a brief comparison to other seesaw models is carried out.