Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1088/1126-6708/2003/09/029
Keywords
field theories in higher dimensions; extra large dimensions; brane dynamics in gauge theories
Categories
Ask authors/readers for more resources
The model of Dvali, Gabadadze, and Porrati (DGP) gives a simple geometrical setup in which gravity becomes 5-dimensional at distances larger than a length scale lambda(DGP). We show that this theory has strong interactions at a length scale lambda(3) similar to (lambda(DGP)(2)/M-P)(1/3). If lambda(DGP) is of order the Hubble length, then the theory loses predictivity at distances shorter than lambda(3) similar to 1000 km. The strong interaction can be viewed as arising from a longitudinal 'eaten Goldstone' mode that gets a small kinetic term only from mixing with transverse graviton polarizations, analogous to the case of massive gravity. We also present a negative-energy classical solution, which can be avoided by cutting off the theory at the same scale scale lambda(3). Finally, we examine the dynamics of the longitudinal Goldstone mode when the background geometry is curved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available