Simplified R-symmetry breaking and low-scale gauge mediation

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作者
Jason L. Evans
Masahiro Ibe
Matthew Sudano
Tsutomu T. Yanagida
机构
[1] University of Tokyo,Institute for the Physics and Mathematics of the Universe
[2] University of Tokyo,Institute for Cosmic Ray Research
关键词
Supersymmetry Breaking; Beyond Standard Model;
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摘要
We argue that some of the difficulties in constructing realistic models of lowscale 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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