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Title: Starobinsky-like inflationary models as avatars of no-scale supergravity

Models of cosmological inflation resembling the Starobinsky R+R{sup 2} model emerge naturally among the effective potentials derived from no-scale SU(N,1)/SU(N) × U(1) supergravity when N > 1. We display several examples in the SU(2,1)/SU(2) × U(1) case, in which the inflaton may be identified with either a modulus field or a matter field. We discuss how the modulus field may be stabilized in models in which a matter field plays the rôle of the inflaton. We also discuss models that generalize the Starobinsky model but display different relations between the tilt in the spectrum of scalar density perturbations, n{sub s}, the tensor-to-scalar ratio, r, and the number of e-folds, N{sub *}. Finally, we discuss how such models can be probed by present and future CMB experiments.
Authors:
 [1] ;  [2] ;  [3]
  1. Theoretical Particle Physics and Cosmology Group, Department of Physics, King's College London, WC2R 2LS London (United Kingdom)
  2. George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A and M University, College Station, 77843 Texas (United States)
  3. William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, 55455 Minnesota (United States)
Publication Date:
OSTI Identifier:
22282662
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; DENSITY; INFLATIONARY UNIVERSE; INFLATONS; PERTURBATION THEORY; POTENTIALS; RELICT RADIATION; SCALARS; SU-2 GROUPS; TENSORS; U-1 GROUPS