Dual unitarisation scheme: semi-analytic treatment of the Oxford-Rutherford type model

A method of calculating trajectory parameters in the Oxford-Rutherford type model is presented. The poles, mixing angles and residues of the f and f' trajectories are calculated at different values of momentum transfer t in the SU(3) symmetry breaking model. The contribution of different regions of phase-space can be directly examined. The contribution of configurations with overlapping clusters builds the deviation from planar trajectories for large positive t. (author)