Flavor structure with multi moduli in 5D SUGRA

TL;DR

This paper explores 5D supergravity models with multiple moduli, revealing new terms in the effective theory that can address the SUSY flavor problem by producing non-tachyonic, flavor-universal soft masses.

Contribution

It introduces a multi-moduli framework in 5D SUGRA that alters the effective theory, offering a novel approach to solving the SUSY flavor problem.

Findings

Additional terms in the 4D effective theory are specific to multi moduli.

Soft masses can be non-tachyonic and flavor-universal at tree-level.

The model provides a new solution to the SUSY flavor problem.

Abstract

We investigate 5-dimensional supergravity on S^1/Z_2 with a physical Z_2-odd vector multiplet, which yields an additional modulus other than the radion. We find additional terms in the 4-dimensional effective theory that are peculiar to the multi moduli case. Such terms can make the soft masses are non-tachyonic and almost flavor-universal at tree-level, in contrast to the single modulus case. This provides a new possibility to solve the SUSY flavor problem.