Can Flavor-Independent Supersymmetry Soft Phases Be the Source of All CP Violation?

TL;DR

This paper explores whether large, flavor-independent supersymmetry soft phases can account for all observed CP violation, including effects in K and B meson systems, without conflicting with electric dipole moment constraints.

Contribution

It demonstrates that flavor-independent soft phases in supersymmetry can be the primary source of CP violation, requiring an unconventional squark mass matrix structure.

Findings

SUSY soft phases can explain ε and ε'/ε

Large SUSY contributions can dominate B system mixing

Unconventional squark mass matrices are needed for consistency

Abstract

Recently it has been demonstrated that large phases in softly broken supersymmetric theories are consistent with electric dipole moment constraints, and are motivated in some (Type I) string models. Here we consider whether large flavor-independent soft phases may be the dominant (or only) source of all CP violation. In this framework $\epsilon$ and $\epsilon'/\epsilon$ can be accommodated, and the SUSY contribution to the B system mixing can be large and dominant. An unconventional flavor structure of the squark mass matrices (with enhanced super-CKM mixing) is required for consistency with B and K system observables.