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Scientific article
English

On the Starobinsky model of inflation from supergravity

Published inNuclear physics. B, vol. 876, no. 1, p. 187-200
Publication date2013
Abstract

We discuss how the higher-derivative Starobinsky model of inflation originates from N=1N=1 supergravity. It is known that, in the old-minimal supergravity description written by employing a chiral compensator in the superconformal framework, the Starobinsky model is equivalent to a no-scale model with F-term potential. We show that the Starobinsky model can also be originated within the so-called new-minimal supergravity, where a linear compensator superfield is employed. In this formulation, the Starobinsky model is equivalent to standard supergravity coupled to a massive vector multiplet whose lowest scalar component plays the role of the inflaton and the vacuum energy is provided by a D-term potential. We also point out that higher-order corrections to the supergravity Lagrangian represent a threat to the Starobinsky model as they can destroy the flatness of the inflaton potential in its scalar field equivalent description.

Keywords
  • Supergravity
  • Starobinskymodel
  • Inflation
Citation (ISO format)
FARAKOS, F., KECHAGIAS, Alexandros, RIOTTO, Antonio Walter. On the Starobinsky model of inflation from supergravity. In: Nuclear physics. B, 2013, vol. 876, n° 1, p. 187–200. doi: 10.1016/j.nuclphysb.2013.08.005
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ISSN of the journal0550-3213
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