Résumé / Abstract Seminaire_GReCO

"A new mechanism for curvature perturbations"

Lingfei Wang
Physics Dept., Lancaster Univ. (Lancaster, Royaume-Uni)

I will explain the spectator scenario and show its advantages compared to the curvaton scenario, under the latest Planck constraints. The spectator scenario generates a smaller non-Gaussianity, negligible isocurvature perturbations, and less tuning. It agrees well with the current Planck data in the visible sector inflation setup, as an example. It also explains the CMB dipole asymmetry with a brief fast roll phase. I will close the talk by proposing the CMB power multipoles, as an alternative approach independent of the CMB dipole asymmetry model.

lundi 21 octobre 2013 - 11:00
Salle des séminaires François Arago,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage