Retrofitted Gravity Mediation without the Gravitino-overproduction Problem

Details Retrofitted Gravity Mediation without the Gravitino-overproduction Problem Retrofitted Gravity Mediation without the Gravitino-overproduction Problem

2007-02-24

arxiv.org/abs/hep-ph/0702247v1

Phys.Rev.D76:083508,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 3 figures

Scientific paper

10.1103/PhysRevD.76.083508

We propose a retrofitted gravity mediation model which alleviates the gravitino overproduction from decays of an inflaton and a supersymmetry breaking field. In the model, we introduce an approximate U(1) symmetry under which the supersymmetry breaking field is charged, although it is broken by a mass term of messenger fields to generate gaugino masses of order the weak scale. In a low-scale inflation model, we find regions in which the gravitino overproduction problem is avoided.

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