Simplified R-Symmetry Breaking and Low-Scale Gauge Mediation

Details Simplified R-Symmetry Breaking and Low-Scale Gauge Mediation Simplified R-Symmetry Breaking and Low-Scale Gauge Mediation

2011-03-23

arxiv.org/abs/1103.4549v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 4 figures, references added, minor changes

Scientific paper

We argue that some of the difficulties in constructing realistic models of low-scale gauge mediation are artifacts of the narrow set of models that have been studied. In particular, much attention has been payed to the scenario in which the Goldstino superfield in an O'Raifeartaigh model is responsible for both supersymmetry breaking and R-symmetry breaking. In such models, the competing problems of generating sufficiently massive gauginos while preserving an acceptably light gravitino can be quite challenging. We show that by sharing the burdens of breaking supersymmetry and R-symmetry with a second field, these problems are easily solved even within the O'Raifeartaigh framework. We present explicit models realizing minimal gauge mediation with a gravitino mass in the eV range that are both calculable and falsifiable.

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