Trapping of Nonabelian Gauge Fields on a Brane

TL;DR

The paper demonstrates that nonabelian gauge fields can be localized on a brane in the Randall-Sundrum model using a topological Higgs mechanism, highlighting differences from abelian gauge field localization.

Contribution

It introduces a new mechanism for trapping nonabelian gauge fields on a brane, extending previous abelian field localization methods.

Findings

Almost massless gauge fields are localized on the brane.

Exactly massless gauge fields are not localized.

Potential issues for nonabelian gauge fields due to mass discontinuity.

Abstract

We show that as in abelian gauge fields, nonabelian gauge fields are also trapped on a brane in the Randall-Sundrum model by applying a new mechanism based on topological Higgs mechanism. It is pointed out that although almost massless gauge fields are localized on the brane by the new mechanism, exactly massless gauge fields are not localized. This fact does not yield any problem to abelian gauge fields, but may give some problem to nonabelian gauge fields since it is known that there is a discontinuity between massless and massive gauge fields in the case of nonabelian gauge groups.