Dynamical localization of gauge fields on a brane

TL;DR

This paper introduces a new dynamical mechanism for localizing both Abelian and non-Abelian gauge fields on a brane, ensuring gauge invariance and charge universality through matter field composites.

Contribution

It presents a novel localization mechanism for gauge fields on a brane, extending previous models by incorporating composite matter fields and preserving gauge invariance.

Findings

Gauge fields can be localized via matter field composites.

The mechanism maintains exact gauge invariance and charge universality.

It generalizes the Dvali-Gabadadze-Shifman scenario.

Abstract

We propose a dynamical mechanism of localization of gauge fields on a brane in which gauge bosons are excitations of the brane itself or composites made out of matter fields localized on the brane. The mechanism is operative for both Abelian and non-Abelian gauge fields. Several scalar and scalar-fermion composite models of gauge fields are considered. The models exhibit exact gauge invariance and therefore charge universality of gauge interactions is automatically preserved. The mechanism is shown to be equivalent to a modification of the Dvali, Gabadadze and Shifman scenario in which gauge bosons have no bulk kinetic terms and only possess induced kinetic terms on the brane.