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On the Starobinsky model of inflation from supergravity

Farakos, F.
Published in Nuclear Physics. B. 2013, vol. 876, no. 1, p. 187-200
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 SupergravityStarobinskymodelInflation
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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. https://archive-ouverte.unige.ch/unige:36477

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Deposited on : 2014-05-12

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