Infrared finite semi-inclusive cross section in two dimensional type 0B string theory

A bstract D-instanton induced S-matrix in type 0B string theory two dimensions suffers from infrared divergences. This can be traced to the fact that these processes produce low energy rolling tachyon states cannot regarded as linear combination of finite number closed states. We compute semi-inclusive cross sections this where we allow final state a fixed set strings carrying given energies and any other rest energy. The result is agrees with results dual matrix model, described by non-relativistic fermions moving an inverted harmonic oscillator potential. In model role ‘any states’ played fermion hole pair on opposite sides potential barrier.