The Price of WMAP Inflation in Supergravity

TL;DR

This paper explores how simple inflationary models compatible with WMAP data can be embedded into supergravity frameworks, focusing on no-scale supergravity and moduli stabilization mechanisms.

Contribution

It analyzes the incorporation of quadratic and symmetry-breaking inflation potentials into supergravity, especially no-scale models, with moduli stabilization strategies.

Findings

Inflation models can be embedded in no-scale supergravity with moduli stabilization.

D- and F-term mechanisms can stabilize moduli in inflationary scenarios.

Supergravity models compatible with WMAP data are feasible with specific stabilization methods.

Abstract

The three-year data from WMAP are in stunning agreement with the simplest possible quadratic potential for chaotic inflation, as well as with new or symmetry-breaking inflation. We investigate the possibilities for incorporating these potentials within supergravity, particularly of the no-scale type that is motivated by string theory. Models with inflation driven by the matter sector may be constructed in no-scale supergravity, if the moduli are assumed to be stabilised by some higher-scale dynamics and at the expense of some fine-tuning. We discuss specific scenarios for stabilising the moduli via either D- or F-terms in the effective potential, and survey possible inflationary models in the presence of D-term stabilisation.