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arXiv · 0705.3075

Discrete R-symmetry anomalies in heterotic orbifold models

Takeshi Araki·Kang-Sin Choi·Tatsuo Kobayashi·Jisuke Kubo·Hiroshi Ohki
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Abstract

Anomalies of discrete R-symmetries appearing in heterotic orbifold models are studied. We find that the mixed anomalies for different gauge groups satisfy the universal Green-Schwarz (GS) condition, indicating that these anomalies are canceled by the GS mechanism. An exact relation between the anomaly coefficients of the discrete R-symmetries and one-loop beta-function coefficients is obtained. We also find that the discrete R-symmetries have a good chance to be unbroken down to the supersymmetry breaking scale. Even below this scale a $Z_2$ subgroup is unbroken, which may be an origin of the R-parity of the minimal supersymmetric standard model. Relations between the R-symmetry anomalies and T-duality anomalies are also investigated.

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Takeshi Araki, Kang-Sin Choi, Tatsuo Kobayashi, Jisuke Kubo, Hiroshi Ohki. 2007-07-23. Discrete R-symmetry anomalies in heterotic orbifold models. https://doi.org/10.1103/physrevd.76.066006

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