Résumé / Abstract Seminaire_GReCO

"Signatures of vector field production during inflation"

Marco Peloso
School Physics Astron., Univ. Minnesota (Minneapolis, Minnesota, Etats-Unis d'Amérique)

We study the phenomenological limits on inflationary models due to possible vector field production during inflation. In the first part of the talk we show that an axion inflaton with a decay constant of the order of 1016 GeV gives rise to a large non-gaussianity of the primordial perturbations, to observable chiral gravity waves at interferometers, and to a large amount of primordial black holes. In the second part of the talk we discuss a different model (first studied by Ratra in the context of magnetogensis), characterized by a dilation-like kinetic coupling between the inflaton and a vector field. This model results in non-gaussianity and broken statistical isotropy of the primordial perturbations at a level which typically exceeds the observational bounds.

jeudi 4 avril 2013 - 14:00
Salle des séminaires François Arago,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage