Abstract

A review is given of the present status of the bootstrap program for 1+1 dimensional field theoretic models with soliton behaviour. From the existence of infinitely many conservation laws, unitarity, crossing, “minimality”, internal symmetries, and some assumptions on the one particle spectrum first the exact S-matrix is derived explicitely. We repeat the procedure for the massive Thirring-model (alias Sine-Gordon) S-matrix starting with two fermion (alias soliton) scattering and then deriving the boundstate (alias breather) S-matrix. The same complete S-matrix is obtained by starting with the determination of the boson (breather) S-matrix and then deriving the boson-soliton and soliton-soliton scattering from the assumption that the soliton is a soliton-boson bound state. By means of the same procedure we obtain the Gross-Neveu S-matrix including the kink scattering. Then for some models generalized form factors and Green’s functions for the Z(2)-Ising model in the scaling limit are calculated.

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