Mass spectrum of scalar and gauge fields in the cosmological multiply warped brane-world

TL;DR

This paper analyzes the mass spectrum of scalar and gauge fields in a six-dimensional multiply warped brane-world model with an FRW metric, revealing unique features of KK modes and their relation to universe expansion.

Contribution

It introduces a detailed computation of massive KK modes in a multiply warped brane-world, highlighting differences from the standard RS model and their cosmological implications.

Findings

Mass spectra split into two towers due to warping in both dimensions.

Lighter massive modes can influence universe expansion.

Mass spectrum depends on the Hubble constant.

Abstract

In this paper, we compute the massive modes of scalar and gauge fields in a multiply warped brane-world scenario in six-dimensional spacetime with a Freedman-Robertson-Walker (FRW) metric. The massive Kaluza-Klein (KK) modes of the fields are split in two mass towers due to the presence of the warped in both dimensions. This does not occurs in the standard Randall-Sundrum (RS) model. We investigate the dependence of the mass spectrum on Hubble constant. Lighter massive modes of the fields are found, whereby it is possible to infer that scalar and bosonic matter can directly influence in universe expansion.