Zhaofeng Kang, Tianjun Li, Zheng Sun
The well-accepted Nelson-Seiberg theorem relates R-symmetries to supersymmetry (SUSY) breaking vacua, and provides a guideline for SUSY model building which is the most promising physics beyond the Standard Model. We revise the theorem to be stated as a combined necessary and sufficient condition. The revised theorem provides a powerful tool to construct either SUSY breaking or SUSY vacua, and offers many practicable applications in low energy SUSY model building and string phenomenology.
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http://arxiv.org/abs/1209.1059
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