Can epsilon'/epsilon be supersymmetric?

TL;DR

This paper investigates the potential supersymmetric contributions to epsilon', highlighting a previously overlooked effect, and discusses implications for other CP-violating observables, suggesting supersymmetry could explain experimental data without fine-tuning.

Contribution

It identifies a significant supersymmetric contribution to epsilon' that was missed in prior literature, using model-independent flavor symmetry arguments.

Findings

Supersymmetric epsilon' estimates align with experimental values without fine-tuning.

Potential correlations with hyperon CP violation and electric dipole moments.

Implications for rare decay processes like mu --> e+gamma.

Abstract

I first motivate why we may want to look at possible new physics contributions to epsilon' given relatively clear experimental but unclear theoretical situations. I reexamine the supersymmetric contribution to epsilon' and find an important one generally missed in the literature. Based on rather model-independent arguments based on flavor symmetries, an estimate of the possible supersymmetric epsilon' is given, which interestingly come around the reported values without fine-tuning. If the observed values are dominated by supersymmetry, it is likely to give interesting consequences on hyperon CP violation, mu --> e+gamma, and neutron and electron electric dipole moments.