Flavor and CP conserving moduli mediated SUSY breaking in flux compactification

TL;DR

This paper investigates flux compactification models with moduli-mediated SUSY breaking that preserve flavor and CP symmetry at leading order, analyzing how higher order effects impact phenomenological constraints and viability.

Contribution

It demonstrates that flavor and CP violations can be suppressed in such models, making them compatible with low-energy constraints even with sub-TeV sparticle spectra.

Findings

Phenomenological constraints are satisfied for generic higher order Kähler potentials.

Mirage mediation and modulus-dominated mediation can avoid SUSY flavor and CP problems.

Sub-TeV gaugino and sfermion masses are achievable without violating flavor or CP bounds.

Abstract

In certain class of flux compactification, moduli mediated supersymmetry (SUSY) breaking preserves flavor and CP at leading order in the perturbative expansion controlled by the vacuum expectation value of the messenger modulus. Nevertheless there still might be dangerous flavor or CP violation induced by higher order K\"ahler potential. We examine the constraints on such SUSY breaking scheme imposed by low energy flavor and/or CP violating observables. It is found that all phenomenological constraints can be satisfied even for generic form of higher order K\"ahler potential and sparticle spectra in the sub-TeV range, under plausible assumptions on the size of higher order correction and flavor mixing angles. This implies for instance that mirage mediation scheme of SUSY breaking, which involves such modulus mediation together with an anomaly mediation of comparable size, and also the modulus-dominated mediation realized in flux compactification can be free from the SUSY flavor and CP problems, while giving gaugino and sfermion masses in the sub-TeV range.