Higgs Boson Exempt No-Scale Supersymmetry with a Neutrino Seesaw: Implications for Lepton Flavor Violation and Leptogenesis

TL;DR

This paper explores an extended no-scale supersymmetry model incorporating heavy neutrinos, analyzing its implications for lepton flavor violation and leptogenesis, and predicting observable signals in future experiments.

Contribution

It introduces a neutrino sector extension to the Higgs boson exempt no-scale supersymmetry model and studies its effects on lepton flavor violation and baryogenesis.

Findings

LFV signals are generically non-zero and detectable in future experiments.

Leptogenesis constraints influence the neutrino Yukawa matrix structure.

Model consistency requires small Higgs soft mass or specific Yukawa textures.

Abstract

Motivated by the observation of neutrino oscillations, we extend the Higgs boson exempt no-scale supersymmetry model (HENS) by adding three heavy right-handed neutrino chiral supermultiplets to generate the light neutrino masses and mixings. The neutrino Yukawa couplings can induce new lepton flavor violating couplings among the soft terms in the course of renormalization group running down from the boundary scale. We study the effects this has on the predictions for low-energy probes of lepton flavor violation(LFV). Heavy right-handed neutrinos also provide a way to generate the baryon asymmetry through leptogenesis. We find that consistency with LFV and leptogenesis puts strong requirements on either the form of the Yukawa mass matrix or the smallness of the Higgs up soft mass. In all cases, we generically expect that new physics LFV is non-zero and can be found in a future experiment.