Equivalence of two contour prescriptions in superstring perturbation theory

  title={Equivalence of two contour prescriptions in superstring perturbation theory},
  author={Ashoke Sen},
  journal={Journal of High Energy Physics},
  • A. Sen
  • Published 3 October 2016
  • Physics
  • Journal of High Energy Physics
A bstractConventional superstring perturbation theory based on the world-sheet approach gives divergent results for the S-matrix whenever the total center of mass energy of the incoming particles exceeds the threshold of production of any final state consistent with conservation laws. Two systematic approaches have been suggested for dealing with this difficulty. The first one involves deforming the integration cycles over the moduli space of punctured Riemann surfaces into complexified moduli… 
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