Supersymmetric (non-)abelian bundles in the type-I and SO(32) heterotic string

  title={Supersymmetric (non-)abelian bundles in the type-I and SO(32) heterotic string},
  author={Ralph Blumenhagen and Gabriele Honecker and Timo Weigand},
  journal={Journal of High Energy Physics},
We discuss perturbative four-dimensional compactifications of both the SO(32) heterotic and the type-I string on smooth Calabi-Yau manifolds endowed with general non-abelian and abelian bundles. We analyse the generalized Green-Schwarz mechanism for multiple anomalous U(1) factors and derive the generically non-universal one-loop threshold corrections to the gauge kinetic function as well as the one-loop corrected Fayet-Iliopoulos terms. The latter can be interpreted as a stringy one-loop… 

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