Constraints on Brane Inflation and Cosmic Strings

Details Constraints on Brane Inflation and Cosmic Strings Constraints on Brane Inflation and Cosmic Strings

2007-10-08

arxiv.org/abs/0710.1541v3

JCAP0801:020,2008

Astronomy and Astrophysics

Astrophysics

11 pages, 3 figures, revtex4, typos corrected, references added

Scientific paper

10.1088/1475-7516/2008/01/020

By considering simple, but representative, models of brane inflation from a single brane-antibrane pair in the slow roll regime, we provide constraints on the parameters of the theory imposed by measurements of the CMB anisotropies by WMAP including a cosmic string component. We find that inclusion of the string component is critical in constraining parameters. In the most general model studied, which includes an inflaton mass term, as well as the brane-antibrane attraction, values n_s < 1.02 are compatible with the data at 95 % confidence level. We are also able to constrain the volume of internal manifold (modulo factors dependent on the warp factor) and the value of the inflaton field to be less than 0.66M_P at horizon exit. We also investigate models with a mass term. These observational considerations suggest that such models have r < 2*10^-5, which can only be circumvented in the fast roll regime, or by increasing the number of antibranes. Such a value of r would not be detectable in CMB polarization experiment likely in the near future, but the B-mode signal from the cosmic strings could be detectable. We present forecasts of what a similar analysis using PLANCK data would yield and find that it should be possible to rule out G\mu > 6.5*10^-8 using just the TT, TE and EE power spectra.

Affiliated with

Also associated with

No associations

Rating

Constraints on Brane Inflation and Cosmic Strings 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 Constraints on Brane Inflation and Cosmic Strings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on Brane Inflation and Cosmic Strings will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-544390