Asymmetrically warped compactifications and gravitational Lorentz violation
Abstract
In a variant of the RandallSundrum braneworld model which has a charged black hole in an antide Sitter bulk, the 4D speed of gravity depends upon one's location in the bulk, and in general differs from the speed of light on a given 3brane. We apply phenomenological constraints on the difference in the speeds of light and gravity to models which use the warping to solve the hierarchy problem. In particular, consideration of the graviCerenkov radiation of KaluzaKlein gravitons by ultrahigh energy cosmic rays, following the approach of Moore and Nelson, leads to a stringent limit on the fractional difference between the graviton and photon speeds in RSlike models: it must be less than a part in 10^{23}.
 Publication:

Journal of High Energy Physics
 Pub Date:
 March 2004
 DOI:
 10.1088/11266708/2004/03/032
 arXiv:
 arXiv:hepph/0312245
 Bibcode:
 2004JHEP...03..032C
 Keywords:

 Field Theories in Higher Dimensions Dbranes Black Holes High Energy Cosmic Rays;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 17 pages, 5 figures