Abstract
We present a counterexample to the Nelson-Seiberg theorem and its extensions. The model has 4 chiral fields, including one R-charge 2 field and no R-charge 0 filed. Giving generic values of coefficients in the renormalizable superpotential, there is a supersymmetric vacuum with one complex dimensional degeneracy. The superpotential equals zero and the R-symmetry is broken everywhere on the degenerated vacuum. The existence of such a vacuum disagrees with both the original Nelson-Seiberg theorem and its extensions, and can be viewed as the consequence of a non-generic R-charge assignment. Such counterexamples may introduce error to the field counting method for surveying the string landscape, and are worth further investigations.
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Sun, Z., Tan, Z. & Yang, L. A counterexample to the Nelson-Seiberg theorem. J. High Energ. Phys. 2020, 72 (2020). https://doi.org/10.1007/JHEP10(2020)072
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DOI: https://doi.org/10.1007/JHEP10(2020)072