Extra dimensions and violations of Lorentz symmetry

TL;DR

This paper derives new constraints on theories with large extra dimensions by using experimental limits on Lorentz violation, focusing on how fundamental quantities vary slowly over cosmological timescales.

Contribution

It introduces a novel approach to constraining Kaluza-Klein theories through Lorentz violation limits, emphasizing the slow variation of fundamental constants.

Findings

New bounds on extra dimension theories from Lorentz violation data

Constraints on the variation of fundamental quantities over cosmological timescales

Implications for large extra dimension models without length units

Abstract

We use experimental limits on Lorentz violation to obtain new constraints on Kaluza-Klein-type theories in which the extra dimensions may be large but do not necessarily have units of length. The associated variation in fundamental quantities such as rest mass must occur slowly, on cosmological scales.