Ju l 2 00 7 HD-THEP-0707 SIAS-CMTP-072 hep-th / yymmnnn Multiple anomalous U ( 1 ) s in heterotic blow – ups

@inproceedings{Nibbelink2007JuL2,
  title={Ju l 2 00 7 HD-THEP-0707 SIAS-CMTP-072 hep-th / yymmnnn Multiple anomalous U ( 1 ) s in heterotic blow – ups},
  author={Stefan Groot Nibbelink and H. P. Nilles and M. Trapletti},
  year={2007}
}
The existence of multiple anomalous U(1)s is demonstrated explicitly in a blow–up version of a heterotic Z3 orbifold. Another blow–up of the same orbifold supports further evidence for the type– I/heterotic duality in four dimensions. It has a single anomalous U(1) which does not factorize universally. As multiple anomalous U(1)s as well as non-universal factorization have never been established on heterotic orbifolds explicitely, these findings might appear contradictory at first sight… CONTINUE READING

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