Question

What is the world-sheet picture of high energy open string scattering?

Answer 1

These scattering amplitudes are of subleading order in energy for the case of 26D open bosonic string theory.

Answer 2

picture of two strings interacting. .... After a conformal map, tree-level scattering corresponds to a worldsheet ..... to scattering amplitudes that decay exponentially at high energies is ...