|
|
Sfb 288 Differential Geometry and Quantum Physics |
Abstract for Sfb Preprint No. 506
Exact form factors in integrable quantum field theories: the sine-Gordon model (II) H. Babujian, M. Karowski
Using the methods of the ``form factor program'' exact expressions of all matrix elements are obtained for several operators of the quantum sine-Gordon model alias the massive Thirring model. A general formula is presented which provides form factors in terms of an integral representation. In particular soliton form factors of charge-less operators as for example the current of the topological charge, the energy momentum tensor and all higher currents are considered. It turns out that the various local operators correspond to specific scalar functions called p-functions. Several results are checked with Feynman graph expansion and full agreement is found. Within the frame work of integrable quantum field theories a general `crossing' formula is derived. Furthermore the `bound state intertwiners' are introduced and the bound state form factors are investigated. The general results are applied to the sine-Gordon model.
Get a gzip-compressed PostScript copy of this preprint
preprint506.ps.gz (170 kB)