Form factors of exponential fields for twoparametric family of integrable models
Abstract
A twoparametric family of integrable models (the SS model) that contains as particular cases several well known integrable quantum field theories is considered. After the quantum group restriction it describes a wide class of integrable perturbed conformal field theories. Exponential fields in the SS model are closely related to the primary fields in these perturbed theories. We use the bosonization approach to derive an integral representation for the form factors of the exponential fields in the SS model. The same representations for the sausage model and the cosinecosine model are obtained as limiting cases. The results are tested at the special points, where the theory contains free particles.
 Publication:

Nuclear Physics B
 Pub Date:
 September 2004
 DOI:
 10.1016/j.nuclphysb.2004.06.043
 arXiv:
 arXiv:hepth/0402082
 Bibcode:
 2004NuPhB.696..301F
 Keywords:

 High Energy Physics  Theory;
 Nonlinear Sciences  Exactly Solvable and Integrable Systems
 EPrint:
 37 pages, 3 figures