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

By John Ellis, D. Nanopoulos, K. Olive. 2013

284 citations recorded by the source corpus.

Models of cosmological inflation resembling the Starobinsky R+R2 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 role 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, ns, the tensor-to-scalar ratio, r, and the number of e-folds, N*. Finally, we discuss how such models can be probed by present and future CMB experiments.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5c8ec57ba431f020fb761c3e280e581bf6a752ee

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Citations in the corpus

Large field inflation and double α-attractors (2014, methodology): “For small α the cosmological predictions of this model were studied in [19] and in [17].”
Superconformal inflationary α-attractors (2013, background): “1, as well as a large set of various conformal, superconformal, and supergravity generalizations of these models, see [1, 5–9,16,17].”
α-attractors: Planck, LHC and dark energy (2015, methodology): “Other models which make related predictions include the fibre inflation model [35] and the Starobinsky-like models developed in [36].”
Minimal Supergravity Models of Inflation (2013, background): “However, moduli stabilization required breaking of the noscale structure of the theory, which slightly modified the inflationary potential of [19], see [21].”
Inflation and String Theory (2014, background): “17 The Starobinsky model has recently received renewed attention—see [224] for a superconformal generalization and [225,226] for a no-scale supergravity version.”
The best inflationary models after Planck (2013, methodology): “N = 193, we have computed the Bayes factors Bi HI with respect to the Starobinsky model [48–50] or Higgs Inflation (HI), which is our reference model.”
Cosmology with nilpotent superfields (2014, methodology): “in [38–52] can be now modified and used in the new construction with the nilpotent superfield.”