DBI Inflation coupled to matter

by Ms Emeline Cluzel (IPhT, CEA Saclay)

Thursday 13 Jan 2011, 16:00 → 17:30 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

After reviewing Dirac-Born-Infeld inflation, I will discuss the mechanism and effects of particle creation during DBI inflation. I will show that the backreaction of created particles on the inflaton field gives rise to a new term in the effective potential and that it can be studied in a scalar-tensor formalism. I will develop the perturbation theory for any model of K-inflation coupled to matter and conclude on the possible appearance of features in the power spectrum due to this coupling with matter and compare such features to other well-known types of features.