A modified Starobinsky's model of inflation: Anomaly-induced inflation, SUSY and graceful exit

Details A modified Starobinsky's model of inflation: Anomaly-induced inflation, SUSY and graceful exit A modified Starobinsky's model of inflation: Anomaly-induced inflation, SUSY and graceful exit

2002-10-24

arxiv.org/abs/hep-ph/0210329v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 8 pages and 2 figures. Talk given at SUSY 2002: the 10th International Conference on Supersymmetry and Unification of F

Scientific paper

We present a model of inflation based on the anomaly-induced effective action of gravity in the presence of a conformally invariant Hilbert-Einstein term. Our approach is based on the conformal representation of the fields action and on the integration of the corresponding conformal anomaly. In contradistinction to the original Starobinsky's model, inflation can be stable at the beginning and unstable at the end. The instability is caused by a slowing down of inflation due to quantum effects associated to the massive fermion fields. In supersymmetric theories this mechanism can be linked to the breaking of SUSY and suggests a natural way to achieve graceful exit from the inflationary to the FLRW phase.

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