
arXiv: 1307.1137
We discuss how the higher-derivative Starobinsky model of inflation originates from N=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.
17 pages, 2 figures, published version
High Energy Physics - Theory, Starobinskymodel, Functional analysis on superspaces (supermanifolds) or graded spaces, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Supergravity, Inflation, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), Unified quantum theories, supergravity, inflation, Starobinsky model, 500.2, Relativistic cosmology
High Energy Physics - Theory, Starobinskymodel, Functional analysis on superspaces (supermanifolds) or graded spaces, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Supergravity, Inflation, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), Unified quantum theories, supergravity, inflation, Starobinsky model, 500.2, Relativistic cosmology
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