Volume 77, Number 2, January 2007
Article Number 20004
Number of page(s) 3
Section General
Published online 11 January 2007
EPL, 77 (2007) 20004
DOI: 10.1209/0295-5075/77/20004

Speed limit on the brane

M. Gogberashvili

Andronikashvili Institute of Physics - 6 Tamarashvili St., Tbilisi 0177, Georgia

received 3 October 2006; accepted in final form 20 November 2006; published January 2007
published online 11 January 2007

Relationship between the speed limit on the brane and in the bulk is discussed. We assume that the speed of light, similar to the 4-dimensional gravitational constant, is not a primary fundamental constant but depends on the gravitational potential of the brane. This opens the way to explain the hierarchy between the Plank and Higgs scales even within the simplest 5-dimensional model.

04.50.+h - Gravity in more than four dimensions, Kaluza-Klein theory, unified field theories; alternative theories of gravity.
03.30.+p - Special relativity.
98.80.-k - Cosmology.

© Europhysics Letters Association 2007