Quasi-fixed points from scalar sequestering and the little hierarchy problem in supersymmetry

TL;DR

This paper explores how scalar sequestering in supersymmetry models leads to quasi-fixed points in mass parameters, potentially easing the little hierarchy problem and suggesting more natural models with non-unified gaugino masses accessible at colliders.

Contribution

It demonstrates that superconformal dynamics induce quasi-fixed points in SUSY mass parameters, offering a novel approach to address the little hierarchy problem.

Findings

Quasi-fixed points prevent mass parameters from vanishing.

Models with non-unified gaugino masses are more natural.

Potential for collider detection of these models.

Abstract

In supersymmetric models with scalar sequestering, superconformal strong dynamics in the hidden sector suppresses the low-energy couplings of mass dimension two, compared to the squares of the dimension one parameters. Taking into account restrictions on the anomalous dimensions in superconformal theories, I point out that the interplay between the hidden and visible sector renormalizations gives rise to quasi-fixed point running for the supersymmetric Standard Model squared mass parameters, rather than driving them to 0. The extent to which this dynamics can ameliorate the little hierarchy problem in supersymmetry is studied. Models of this type in which the gaugino masses do not unify are arguably more natural, and are certainly more likely to be accessible, eventually, to the Large Hadron Collider.