Abstract
Recently Polyakov proposed an -point Green's function for closed strings. We consider the problem of finding poles in the external momenta and extracting on-shell scattering amplitudes from . Moreover, we find that is invariant under complex Möbius transformations, and is presumably dual.
- Received 21 September 1981
DOI:https://doi.org/10.1103/PhysRevD.25.2706
©1982 American Physical Society