Regge-Pole Couplings to Nucleons in a Field-Theory Model

Abstract

Perturbation theory is used to consider the coupling of both normal- and abnormal-parity Regge poles to nucleons. The kinematic dependence of the residue functions on the trajectory function is obtained. All spin-flip amplitudes have fixed poles in both the angular momentum and energy variables. One of the abnormal parity trajectories satisfies a conspiracy condition corresponding to Freedman and Wang's class II. The daughter pole in this case moves exactly parallel to the leading trajectory, unlike the daughter arising from unequal-mass kinematics.