Anomalies and Fermion Content of Grand Unified Theories in Extra Dimensions
classification
✦ hep-ph
keywords
chiralcontentfermiontheoriesanomaliesanomalycancellationconsistent
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The restrictions imposed by anomaly cancellation on the chiral fermion content of nonsupersymmetric gauge theories based on various groups are studied in spacetime dimension D=6, 8, and 10. In particular, we show that the only mathematically consistent chiral SU(5) theory in D=6 contains three nonidentical generations.
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