Comment on Kaluza-Klein Spectrum of Gauge Fields in the Bigravity Model
Motoi Tachibana
TL;DR
This paper investigates the behavior of bulk gauge fields in a bigravity model with two positive tension AdS4 branes in AdS5, analyzing the Kaluza-Klein spectrum and finding no ultralight modes.
Contribution
It provides a detailed analysis of the gauge field spectrum in a bigravity setup, highlighting differences from the graviton spectrum.
Findings
No ultralight Kaluza-Klein modes found for gauge fields
Mass spectrum determined for bulk gauge fields
Distinct behavior compared to graviton modes
Abstract
We study behavior of bulk gauge field in the bigravity model in which two positive tension branes in bulk are included. We solve the equations of motions for Kaluza-Klein modes and determine the mass spectrum. It is shown that unlike the case of graviton, we find no ultralight Kaluza-Klein modes in the spectrum.
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