Relation Between the Multi-Regge Model and the Missing-Mass Spectrum

The integral equation approach to the multi-Regge peripheral model is applied to give the missing-mass spectrum with Regge behavior in $s$ and $M^2$. A simple factorizable model for the double Regge coupling then gives the magnitude and $t$ dependence of the cross section. This model is found to be in reasonable agreement with the backward ${\pi }^{-}+p\to p+X^{-}$ data.