String field theory as world-sheet UV regulator

  title={String field theory as world-sheet UV regulator},
  author={Ashoke Sen},
  journal={Journal of High Energy Physics},
  • A. Sen
  • Published 1 February 2019
  • Computer Science
  • Journal of High Energy Physics
Even at tree level, the first quantized string theory suffers from apparent short distance singularities associated with collision of vertex operators that prevent us from straightforward numerical computation of various quantities. Examples include string theory S-matrix for generic external momenta and computation of the spectrum of string theory under a marginal deformation of the world-sheet theory. The former requires us to define the S-matrix via analytic continuation or as limits of… 

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