TY  - JOUR
AU  - Barenboim, G.
AU  - Chun, E. J.
AU  - Lee, H. M.
PY  - 2014
DA  - 2014//
TI  - Coleman-Weinberg inflation in light of Planck
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 81
EP  - 88
VL  - 730
PB  - Elsevier Science Bv
AB  - 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.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1309.1695
UR  - https://doi.org/10.1016/j.physletb.2014.01.039
DO  - 10.1016/j.physletb.2014.01.039
LA  - English
N1  - WOS:000333506400016
ID  - Barenboim_etal2014
ER  -