Unambiguous fermionic-string amplitudes.

@article{La1989UnambiguousFA,
  title={Unambiguous fermionic-string amplitudes.},
  author={R J La and Nelson},
  journal={Physical review letters},
  year={1989},
  volume={63 1},
  pages={24-27}
}
We show how to treat boundary divergences in heterotic string theory covariantly and unambiguously. The method applies even to theories with nonvanishing tadpoles; in this case the Fischler-Susskind mechanism sufficies to ensure well defined answers. Also n-point functions are well defined with no special string-tension renormalizations. As an example we find the loop corrections to the linearized background equations of motion for the O(16)×O(16) string needed to give unambiguous, finite… CONTINUE READING

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