Dual Absorptive Model and Structure in Inelastic Reactions

The implications of a model for two-body scattering amplitudes combining duality and strong absorption are investigated for inelastic reactions. At $t=t_c$, where the imaginary part of the helicity-nonflip amplitude vanishes in the model, predictions about the real part can be made via fixed-$t$ dispersion relations. Strong results can be thus obtained for amplitudes which are antisymmetric under $s\leftrightarrow u$ crossing. As examples, definite predictions on ${\pi }^{-}p\to {\pi }^{0}n$ polarization and $K_L^{0}p\to K_S^{0}p$ differential cross section at $t=t_c$ are made. The general case without the $s\leftrightarrow u$ antisymmetry is also discussed.