Trapped Brane Features in DBI Inflation
High Energy Physics - Theory
2011-03-09 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
We consider DBI inflation with a quadratic potential and the effect of trapped branes on the inflationary fluctuations. When going through a trapped brane the effective potential of the inflaton receives a contribution whose effect is to induce a jump in the power spectrum of the inflaton perturbations. This feature appears in the power spectrum at a scale corresponding to the size of the sound horizon when the two branes cross each other.
Keywords
Cite
@article{arxiv.1010.4462,
title = {Trapped Brane Features in DBI Inflation},
author = {Philippe Brax and Emeline Cluzel},
journal= {arXiv preprint arXiv:1010.4462},
year = {2011}
}
Comments
This paper has been withdrawn by the authors. Article superseded by arXiv:1102.1917