1 research outputs found
Exact S-Matrix for 2D String Theory
We formulate simple graphical rules which allow explicit calculation of
nonperturbative -matrices. This allows us to investigate the
constraint of nonperturbative unitarity, which indeed rules out some theories.
Nevertheless, we show that there is an infinite parameter family of
nonperturbatively unitary -matrices. We investigate the dependence of
the -matrix on one of these nonperturbative parameters. In particular, we
study the analytic structure, background dependence, and high-energy behavior
of some nonperturbative -matrices. The scattering amplitudes display
interesting resonant behavior both at high energies and in the complex energy
plane.Comment: 42p