Mirror Mediation

TL;DR

The paper demonstrates that mirror symmetry in string compactifications naturally separates flavor physics from supersymmetry breaking, providing a solution to the supersymmetric flavor and CP problems without additional mediation mechanisms.

Contribution

It introduces a mirror mediation mechanism where flavor and supersymmetry breaking sectors are decoupled in string compactifications, offering a novel solution to longstanding problems.

Findings

Mirror symmetry leads to a natural factorization of the effective action.

Flavor arises from one moduli sector, supersymmetry breaking from the mirror sector.

The mechanism is explicitly realized in IIB flux compactification models.

Abstract

I show that the effective action of string compactifications has a structure that can naturally solve the supersymmetric flavour and CP problems. At leading order in the g_s and \alpha' expansions, the hidden sector factorises. The moduli space splits into two mirror parts that depend on Kahler and complex structure moduli. Holomorphy implies the flavour structure of the Yukawa couplings arises in only one part. In type IIA string theory flavour arises through the Kahler moduli sector and in type IIB flavour arises through the complex structure moduli sector. This factorisation gives a simple solution to the supersymmetric flavour and CP problems: flavour physics is generated in one sector while supersymmetry is broken in the mirror sector. This mechanism does not require the presence of gauge, gaugino or anomaly mediation and is explicitly realised by phenomenological models of IIB flux compactifications.