Naturally Flavorful Supersymmetry at the LHC

TL;DR

This paper explores how certain supersymmetric models can evade low-energy flavor and CP violation constraints while predicting observable superparticle signatures at the LHC, linking flavor structure to collider phenomenology.

Contribution

It provides a model-independent analysis of flavor constraints in supersymmetry and identifies frameworks that naturally suppress problematic operators, enabling light superparticles consistent with observations.

Findings

Superpotential operators generating scalar trilinear interactions are typically problematic.

Certain frameworks naturally avoid dangerous operators, allowing light superparticles.

Intergenerational sfermion mass splittings can be large and measurable at the LHC.

Abstract

The suppression of flavor and CP violation in supersymmetric theories may be due to the mechanism responsible for the structure of the Yukawa couplings. We study model independently the compatibility between low energy flavor and CP constraints and observability of superparticles at the LHC, assuming a generic correlation between the Yukawa couplings and the supersymmetry breaking parameters. We find that the superpotential operators that generate scalar trilinear interactions are generically problematic. We discuss several ways in which this tension is naturally avoided. In particular, we focus on several frameworks in which the dangerous operators are naturally absent. These frameworks can be combined with many theories of flavor, including those with (flat or warped) extra dimensions, strong dynamics, or flavor symmetries. We show that the resulting theories can avoid all the low energy constraints while keeping the superparticles light. The intergenerational mass splittings among the sfermions can reflect the structure of the underlying flavor theory, and can be large enough to be measurable at the LHC. Detailed observations of the superparticle spectrum may thus provide new handles on the origin of the flavor structure of the standard model.