Reggeon cuts in a multiparticle unitarity model. II

The reggeon cuts are investigated in a model with four-particle unitarity in the t-channel. The model, which was previously discussed by McCoy and Wu, is derived from phi3 theory. The analysis of asymptotic behaviour uses momentum-space techniques. The integral equation for the partial-wave amplitude is carefully investigated and is used to exhibit the origin of the various reggeon cuts, which turn out to satisfy discontinuity formulae consistent with Gribov's reggeon calculus. It is suggested that there is a four-particle Regge pole to the right of all the cuts. (Auth.)