%0 Journal Article
%T Induced-gravity in inflation no-scale supergravity and beyond
%A Pallis, C.
%J Journal of Cosmology and Astroparticle Physics
%D 2014
%V 08
%N 8
%I Iop Publishing Ltd
%@ 1475-7516
%G English
%F Pallis2014
%O WOS:000341848800057
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1944), last updated on Thu, 16 Oct 2014 18:49:10 +0000
%X Supersymmetric versions of induced-gravity inflation are formulated within Supergravity (SUGRA) employing two gauge singlet chiral super fields. The proposed super-potential is uniquely determined by applying a continuous R and a discrete Z(n) symmetry. We select two types of logarithmic Kahler potentials, one associated with a no-scale-type SU(2, 1)/SU(2) x U(1)(R) x Z(n) Kahler manifold and one more generic. In both cases, imposing a lower bound on the parameter c R involved in the coupling between the inflaton and the Ricci scalar curvature – e.g. c(R) greater than or similar to 76, 105, 310 for n – 2, 3 and 6 respectively -, inflation can be attained even for subplanckian values of the inflaton while the corresponding effective theory respects the perturbative unitarity. In the case of no-scale SUGRA we show that, for every n, the inflationary observables remain unchanged and in agreement with the current data while the inflaton mass is predicted to be 3 . 10(13) GeV. Beyond no-scale SUGRA the inflationary observables depend mildly on n and crucially on the coefficient involved in the fourth order term of the Kahler potential which mixes the inflaton with the accompanying non-inflaton field.
%K inflation
%K supersymmetry and cosmology
%R 10.1088/1475-7516/2014/08/057
%U http://arxiv.org/abs/arXiv:1403.5486
%U https://doi.org/10.1088/1475-7516/2014/08/057
%P 057-20pp