Fine Tuning in Supersymmetric Models

TL;DR

This paper reviews fine tuning issues in supersymmetric models, critiques traditional measures, proposes an alternative, and discusses implications for the MSSM, aiming to better understand naturalness in these theories.

Contribution

It introduces an alternative measure of fine tuning in supersymmetric models and analyzes its implications for the MSSM.

Findings

Traditional fine tuning measures may overestimate tuning levels.

The proposed measure offers a different perspective on naturalness.

Implications suggest some models are less fine tuned than previously thought.

Abstract

The solution of a fine tuning problem is one of the principal motivations of Supersymmetry. However experimental constraints indicate that many Supersymmetric models are also fine tuned (although to a much lesser extent). We review the traditional measure of this fine tuning used in the literature and propose an alternative. We apply this to the MSSM and show the implications.