ωIndependence of Internal Regge Couplings at Zero Momentum Transfer

Based on the analyticity properties of production amplitudes, we prove that the Reggeon-Reggeon-particle coupling $K(t_1, t_2, \omega )$ is independent of the $\omega$ angle when either $t_1$ or $t_2$ vanishes. This phenomenon is connected with the fact that the surfaces $t_1=0\mathrm{}$ and $t_2=0\mathrm{}$ are asymptotes of physical boundaries on which $cos\omega$ is not defined. Our finding allows a considerable simplification of phenomenological analyses of multiparticle production data.