Natural Supergravity Inflation

Details Natural Supergravity Inflation Natural Supergravity Inflation

1992-10-21

arxiv.org/abs/hep-th/9210114v1

Phys.Lett.B298:292-298,1993

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, CERN-TH.6685/92, UPR-0526T

Scientific paper

10.1016/0370-2693(93)91823-6

We show that a single uncharged chiral superfield, canonically coupled to \mbox{$N=1$} supergravity with vanishing superpotential, naturally drives inflation in the early universe for a class of simple Kahler potentials. Inflation occurs due to the one-loop generation of a Kahler anomaly proportional to $\R^2$. The coefficient of this $\R^2$ term is of the correct magnitude to describe all aspects of an inflationary cosmology, including sufficient amplitude perturbations and reheating. Higher order terms proportional to $\R^n$ for $n \geq 3$ are naturally suppressed relative to the $\R^2$ term and, hence, do not destabilize the theory.

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