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Geneva University seminars

A new mechanism for curvature perturbations

by Lingfei Wang (Lancaster U.)

Europe/Zurich
Room 234 (Geneva University)

Room 234

Geneva University

24 quai E. Ansermet, CH-1211 Genève 4
Description
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.