Complex Regge poles and hypercharge-exchange reactions

The difficulties of the Regge-pole model in the hypercharge-exchange reactions are pointed out and the presence of the cuts is argued. The pole-cut amplitude is considered in the complex-conjugate-poles approximation. From experimental data for K⁻n→Λπ⁻ and π⁻p→ΛK⁰ the strong form of exchange degeneracy between K* and $K^{**}$ trajectories at t=-0.4 (GeV/c)⁻² is deduced.