OMEGA INDEPENDENCE 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(t1,t2,ω) is independent of the ω angle when either t1 or t2 vanishes. This phenomenon is connected with the fact that the surfaces t1=0 and t2=0 are asymptotes of physical boundaries on which cosω is not defined. Our finding allows a considerable simplification of phenomenological analyses of multiparticle production data. © 1969 The American Physical Society.