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Trapped Brane Features in DBI Inflation

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arxiv 1010.4462 v2 pith:JT4NS437 submitted 2010-10-21 hep-th astro-ph.COhep-ph

Philippe Brax , Emeline Cluzel This is my paper
classification hep-thastro-ph.COhep-ph
keywords trappedbranebraneseffectinflationinflatonpotentialpower
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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.

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