@Article{Lazaries+Pallis2015,
author="Lazaries, G.
and Pallis, C.",
title="Shift symmetry and Higgs inflation in supergravity with observable gravitational waves",
journal="Journal of High Energy Physics",
year="2015",
publisher="Springer",
volume="11",
number="11",
pages="114--28pp",
optkeywords="Cosmology of Theories beyond the SM; Supergravity Models; Supersymmetric Effective Theories",
abstract="We demonstrate how to realize within supergravity a novel chaotic-type inflationary scenario driven by the radial parts of a conjugate pair of Higgs superfields causing the spontaneous breaking of a grand unified gauge symmetry at a scale assuming the value of the supersymmetric grand unification scale. The superpotential is uniquely determined at the renormalizable level by the gauge symmetry and a continuous R symmetry. We select two types of Kahler potentials, which respect these symmetries as well as an approximate shift symmetry. In particular, they include in a logarithm a dominant shift-symmetric term proportional to a parameter c{\textit{} together with a small term violating this symmetry and characterized by a parameter c(+). In both cases, imposing a lower bound on c{}}, inflation can be attained with subplanckian values of the original inflaton, while the corresponding effective theory respects perturbative unitarity for r +/- = c(+)/c{\_} <= 1. These inflationary models do not lead to overproduction of cosmic defects, are largely independent of the one-loop radiative corrections and accommodate, for natural values of r +/-, observable gravitational waves consistently with all the current observational data. The inflaton mass is mostly confined in the range (3.7 -- 8.1) x 10(10) GeV.",
optnote="WOS:000365101200001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2467), last updated on Thu, 17 Dec 2015 14:38:33 +0000",
issn="1029-8479",
doi="10.1007/JHEP11(2015)114",
opturl="http://arxiv.org/abs/1508.06682",
opturl="https://doi.org/10.1007/JHEP11(2015)114",
archivePrefix="arXiv",
eprint="1508.06682",
language="English"
}