Spontaneous localization of bulk matter fields

TL;DR

This paper investigates how FI-terms in compactified models can lead to spontaneous localization of charged bulk fields on branes, affecting supersymmetry and gauge symmetry breaking.

Contribution

It demonstrates that localized FI-terms can cause spontaneous localization of bulk matter fields, revealing new mechanisms for symmetry breaking in extra-dimensional models.

Findings

Supersymmetry or gauge symmetry breaks if charge sum is non-zero.

Localized FI-terms can induce instabilities.

Charged bulk fields localize on branes due to FI-term effects.

Abstract

We study models compactified on S^1/Z_2 with bulk and brane matter fields charged under U(1) gauge symmetry. We calculate the FI-terms and show by minimizing the resulting potential that supersymmetry or gauge symmetry is spontaneously broken if the sum of the charges does not vanish. Even if this sum vanishes, there could be an instability as a consequence of localized FI-terms. This leads to a spontaneous localization of charged bulk fields on respective branes.