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Title: Induced-gravity inflation in no-scale supergravity and beyond

Abstract

Supersymmetric versions of induced-gravity inflation are formulated within Supergravity (SUGRA) employing two gauge singlet chiral superfields. The proposed superpotential is uniquely determined by applying a continuous R and a discrete Z{sub n} symmetry. We select two types of logarithmic Kähler potentials, one associated with a no-scale-type SU(2,1)/SU(2)× U(1){sub R}×Z{sub n} Kähler manifold and one more generic. In both cases, imposing a lower bound on the parameter c{sub R} involved in the coupling between the inflaton and the Ricci scalar curvature — e.g. c{sub R}∼> 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{sup 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 Kähler potential which mixes the inflaton with the accompanying non-inflaton field.

Authors:
 [1]
  1. Departament de Física Teòrica and IFIC, Universitat de València-CSIC, E-46100 Burjassot (Spain)
Publication Date:
OSTI Identifier:
22373370
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHIRALITY; COSMOLOGICAL INFLATION; COUPLING; GRAVITATION; POTENTIALS; SUPERGRAVITY; SUPERSYMMETRY; UNITARITY

Citation Formats

Pallis, C., E-mail: kpallis@gen.auth.gr. Induced-gravity inflation in no-scale supergravity and beyond. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/08/057.
Pallis, C., E-mail: kpallis@gen.auth.gr. Induced-gravity inflation in no-scale supergravity and beyond. United States. doi:10.1088/1475-7516/2014/08/057.
Pallis, C., E-mail: kpallis@gen.auth.gr. Fri . "Induced-gravity inflation in no-scale supergravity and beyond". United States. doi:10.1088/1475-7516/2014/08/057.
@article{osti_22373370,
title = {Induced-gravity inflation in no-scale supergravity and beyond},
author = {Pallis, C., E-mail: kpallis@gen.auth.gr},
abstractNote = {Supersymmetric versions of induced-gravity inflation are formulated within Supergravity (SUGRA) employing two gauge singlet chiral superfields. The proposed superpotential is uniquely determined by applying a continuous R and a discrete Z{sub n} symmetry. We select two types of logarithmic Kähler potentials, one associated with a no-scale-type SU(2,1)/SU(2)× U(1){sub R}×Z{sub n} Kähler manifold and one more generic. In both cases, imposing a lower bound on the parameter c{sub R} involved in the coupling between the inflaton and the Ricci scalar curvature — e.g. c{sub R}∼> 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{sup 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 Kähler potential which mixes the inflaton with the accompanying non-inflaton field.},
doi = {10.1088/1475-7516/2014/08/057},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 08,
volume = 2014,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 2014},
month = {Fri Aug 01 00:00:00 EDT 2014}
}