Gravitational stability and screening effect from /D extra timelike dimensions
Abstract
We study (3+1)+ D dimensional spacetime, where D extra dimensions are timelike. Compactification of the D timelike dimensions leads to tachyonic KaluzaKlein gravitons. We calculate the gravitational selfenergies of massive spherical bodies due to the tachyonic exchange, discuss their stability, and find that the gravitational force is screened in a certain number of the extra dimensions. We also derive the exact relationship between the Newton constants in the full (4+ D)dimensional spacetime with the D extra times and the ordinary Newton constant of our 4dimensional world.
 Publication:

Nuclear Physics B
 Pub Date:
 April 2001
 DOI:
 10.1016/S05503213(00)007768
 arXiv:
 arXiv:hepth/0008216
 Bibcode:
 2001NuPhB.599..119M
 Keywords:

 High Energy Physics  Theory;
 High Energy Physics  Phenomenology
 EPrint:
 harvmac, 20 pages, typos corrected, refs. added and corrected