Bonn 2010 – scientific programme
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T: Fachverband Teilchenphysik
T 23: Theoretische Astroteilchenphysik und Kosmologie I
T 23.2: Talk
Wednesday, March 17, 2010, 14:15–14:30, HG XV
Chaotic Inflation in Supergravity with Heisenberg Symmetry — Stefan Antusch1, Mar Bastero-Gil2, Koushik Dutta1, Steve F. King3, and •Philipp M. Kostka1 — 1Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany — 2Departamento de Fisica Teorica y del Cosmos and Centro Andaluz de Fisica de Particulas Elementales, Universidad de Granada, 19071 Granada, Spain — 3School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, United Kingdom
We propose the introduction of a Heisenberg symmetry of the Kähler potential to solve the problems with chaotic inflation in supergravity, as a viable alternative to the use of shift symmetry. The slope of the inflaton potential emerges from a small Heisenberg symmetry breaking term in the superpotential. The modulus field of the Heisenberg symmetry is stabilized and made heavy with the help of the large vacuum energy density during inflation. The observable predictions are indistinguishable from those of typical chaotic inflation models, however the form of the inflationary superpotential considered here may be interpreted in terms of sneutrino inflation.