Zero-slope limit of the pomeron field theory

A reggeon field theory for the pomeron is considered in which the pomeron slope α'=0, following two previous papers on the subject. The resulting one-dimensional theory is put in the form of a Schroedinger equation. Here, the particular ordering of non-commuting operators in the Hamiltonian is considered which properly reproduces the original pomeron field theory. The solution is deduced, together with the precise statement of the symmetry property of the problem and of the relation of this approach with the formal perturbative expansion. (Auth.)