Form factors of the sausage model obtained with bootstrap fusion from sine-Gordon theory

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We continue the investigation of massive integrable models by means of the bootstrap fusion procedure started in our previous work on the O(3) nonlinear σ model. Using an analogy with the SU(2) Thirring model and the O(3) nonlinear σ model we prove a similar relation between sine-Gordon theory and a one-parameter deformation of the O(3) σ model, the sausage model. This allows us to write down a free field representation for the Zamolodchikov-Faddeev algebra of the sausage model and to construct an integral representation for the generating functions of form factors in this theory. We also clear up the origin of the singularities in the bootstrap construction and the reason for the problem with the kinematical poles.

Original languageEnglish
Pages (from-to)3272-3284
Number of pages13
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number6
Publication statusPublished - Jan 1 1996


ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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