%0 Journal Article
%T Coleman-Weinberg inflation in light of Planck
%A Barenboim, G.
%A Chun, E. J.
%A Lee, H. M.
%J Physics Letters B
%D 2014
%V 730
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F Barenboim_etal2014
%O WOS:000333506400016
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1741), last updated on Thu, 01 May 2014 09:20:23 +0000
%X We revisit a single field inflationary model based on Coleman-Weinberg potentials. We show that in small field Coleman-Weinberg inflation, the observed amplitude of perturbations needs an extremely small quartic coupling of the inflaton, which might be a signature of radiative origin. However, the spectral index obtained in a standard cosmological scenario turns out to be outside the 2 sigma region of the Planck data. When a non-standard cosmological framework is invoked, such as brane-world cosmology in the Randall-Sundrum model, the spectral index can be made consistent with Planck data within la, courtesy of the modification in the evolution of the Hubble parameter in such a scheme. We also show that the required inflaton quartic coupling as well as a phenomenologically viable B – L symmetry breaking together with a natural electroweak symmetry breaking can arise dynamically in a generalized B – L extension of the Standard Model where the full potential is assumed to vanish at a high scale.
%R 10.1016/j.physletb.2014.01.039
%U http://arxiv.org/abs/1309.1695
%U https://doi.org/10.1016/j.physletb.2014.01.039
%P 81-88