2013

The Best Inflationary Models After Planck

Martin, Jerome, Ringeval, Christophe, Trotta, Roberto et al.

Understand

We compute the Bayesian evidence and complexity of 193 slow-roll single-field models of inflation using the Planck 2013 Cosmic Microwave Background data, with the aim of establishing which models are favoured from a Bayesian perspective.

Our calculations employ a new numerical pipeline interfacing an inflationary effective likelihood with the slow-roll library ASPIC and the nested sampling algorithm MULTINEST.
The models considered represent a complete and systematic scan of the entire landscape of inflationary scenarios proposed so far.
Our analysis singles out the most probable models (from an Occam's razor point of view) that are compatible with Planck data, while ruling out with very strong evidence 34% of the models considered.

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