Form factors of soliton-creating operators in the sine-Gordon model

We propose explicit expressions for the form factors, including their norma lization constants, of topologically charged (or soliton-creating) operator s in the sine-Gordon model. The normalization constants, which constitute t he main content of our proposal, allow one to find exact relations between the short- and long-distance asymptotics of the correlation functions. We m ake predictions concerning asymptotics of fermion correlation functions in the massive Thirring model, SU(2)-Thirring model with anisotropy, and in th e half-filled Hubbard chain. (C) 2001 Elsevier Science B.V. All rights rese rved.