Inverse seesaw mechanism with compact supersymmetry: enhanced naturalness and light super-partners

TL;DR

This paper explores a supersymmetric inverse seesaw model with a low-energy spectrum that can be as light as 500-600 GeV, enhancing naturalness and predicting unique collider and dark matter signatures.

Contribution

It introduces a compact supersymmetric inverse seesaw framework with a low effective scale, leading to lighter super-partners and distinctive spectrum features compared to traditional models.

Findings

Effective supersymmetric spectrum as low as 500-600 GeV.

Enhanced Higgs mass due to large neutrino Yukawa couplings.

Lightest supersymmetric particle can be an admixture of sneutrinos.

Abstract

We consider the supersymmetric inverse seesaw mechanism for neutrino mass generation within the context of a low energy effective theory where supersymmetry is broken geometrically in an extra dimensional theory. It is shown that the effective scale characterizing the resulting compact supersymmetric spectrum can be as low as 500-600 GeV for moderate values of $\tan\beta$. The potentially large neutrino Yukawa couplings, naturally present in inverse seesaw schemes, enhance the Higgs mass and allow the super-partners to be lighter than in compact supersymmetry without neutrino masses. The inverse seesaw structure also implies a novel spectrum profile and couplings, in which the lightest supersymmetric particle can be an admixture of isodoublet and isosinglet sneutrinos. Dedicated collider as well as dark matter studies should take into account such specific features.