Multifield inflation and cosmological anomalies after Planck
by
Christian Byrnes(U of Sussex)
→
Europe/Berlin
seminar room 2, building 2A (DESY Hamburg)
seminar room 2, building 2A
DESY Hamburg
Description
After the Planck 2015 results, which remain consistent with some of the simplest single-field models of inflation, one may ask whether there remains any motivation to consider inflationary models with multiple light fields. I discuss this question, and show that a Bayesian model comparison between the curvaton scenario (which has two fields and at least 4 free parameters) and simpler single-field scenarios does not disfavour the complex model. I also discuss how inflationary models can explain the observed dipolar power asymmetry, and the extreme difficulties of building a complete working model.
