Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-04-15
JHEP0205:016,2002
Physics
High Energy Physics
High Energy Physics - Theory
20 pages, JHEP3.cls
Scientific paper
10.1088/1126-6708/2002/05/016
We study cosmology on a BPS D3-brane evolving in the 10D SUGRA background describing a non-BPS brane. Initially the BPS brane is taken to be a probe whose dynamics we determine in the non-compact non-BPS background. The cosmology observed on the brane is of the FRW type with a scale factor $S(\tau)$. In this mirage cosmology approach, there is no self-gravity on the brane which cannot inflate. Self-gravity is then included by compactifying the background space-time. The low energy effective theory below the compactification scale is shown to be bi-metric, with matter coupling to a different metric than the geometrically induced metric on the brane. The geometrical scale factor on the brane is now $S(\tau) a(\tau)$ where $a(\tau)$ arises from brane self-gravity. In this non-BPS scenario the brane generically inflates. We study the resulting inflationary scenario taking into account the fact that the non-BPS brane eventually decays on a time-scale much larger than the typical inflationary time-scale. After the decay, the theory ceases to be bi-metric and COBE normalization is used to estimate the string scale which is found to be of order $10^{14}$ GeV.
Brax Ph
Steer Daniele A.
No associations
LandOfFree
Non-BPS Brane Cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-BPS Brane Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-BPS Brane Cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-383547