Approximate R-symmetries and the mu term
Brummer, Felix and Kappl, Rolf and Ratz, Michael and Schmidt-Hoberg, Kai
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Abstract
We discuss the role of approximate U(1)_R symmetries for the understanding of hierarchies in Nature. Such symmetries may explain a suppressed expectation value of the superpotential and provide us with a solution to the MSSM mu problem. We present various examples in field theory and string-derived models.
