BICEP/Keck and cosmological attractors
Abstract
We discuss implications of the latest BICEP/Keck data release for inflationary models, with special emphasis on the cosmological attractors which can describe all presently available inflationrelated observational data. These models are compatible with any value of the tensor to scalar ratio r, all the way down to r = 0. Some of the string theory motivated models of this class predict 10^{3} ≤ r ≤ 10^{2}. The upper part of this range can be explored by the ongoing BICEP/Keck observations.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 December 2021
 DOI:
 10.1088/14757516/2021/12/008
 arXiv:
 arXiv:2110.10902
 Bibcode:
 2021JCAP...12..008K
 Keywords:

 inflation;
 Inflation and CMBR theory;
 primordial gravitational waves (theory);
 cosmological parameters from CMBR;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 14 pages, 10 figures. A figure added with a comparison of the new constraints on r and $n_s$ given in 2112.07961 and predictions of $\alpha$attractors