期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/03/039
关键词
inflation; CMBR experiments; physics of the early universe; cosmological parameters from CMBR
资金
- ESA Belgian Federal PRODEX Grant [4000103071]
- Wallonia-Brussels Federation grant [11/15-040]
- STFC [ST/K001051/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K001051/1] Funding Source: researchfish
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 A S P I C 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. We identify 26% of the models that are favoured by the Bayesian evidence, corresponding to 15 different potential shapes. If the Bayesian complexity is included in the analysis, only 9% of the models are preferred, corresponding to only 9 different potential shapes. These shapes are all of the plateau type.
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