Expectation values of local fields for a two-parameter family of integrable models and related perturbed conformal field theories

Abstract

We calculate the vacuum expectation values of local fields for the two-parameter family of integrable field theories introduced and studied by Fateev. Using this result we propose an explicit expression for the vacuum expectation values of local operators in parafermionic sine-Gordon models and in integrable perturbed SU(2) coset conformal field theories.

21 pages, LaTex file with amstex

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