The gauging of two-dimensional bosonic sigma models on world-sheets with defects

@article{Gawdzki2013TheGO,
  title={The gauging of two-dimensional bosonic sigma models on world-sheets with defects},
  author={K. Gawȩdzki and Rafal R. Suszek and Konrad Waldorf},
  journal={Reviews in Mathematical Physics},
  year={2013},
  volume={25},
  pages={1350010}
}
We extend our analysis of the gauging of rigid symmetries in bosonic two-dimensional sigma models with Wess–Zumino terms in the action to the case of world-sheets with defects. A structure that permits a non-anomalous coupling of such sigma models to world-sheet gauge fields of arbitrary topology is analyzed, together with obstructions to its existence, and the classification of its inequivalent choices. 
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