Correlation Functions in 2-Dimensional Integrable Quantum Field Theories

Abstract

In this talk I discuss the form factor approach used to compute correlation functions of integrable models in two dimensions. The Sinh-Gordon model is our basic example. Using Watson's and the recursive equations satisfied by matrix elements of local operators, I present the computation of the form factors of the elementary field $\varphi (x)$ and the stress-energy tensor $T_{\mu \nu }(x)$ of the theory.

19pp, LATEX version, (talk at Como Conference on ``Integrable Quantum Field Theories'')