On the Form Factors of Relevant Operators and their Cluster Property
arXiv:hep-th/9609080 · doi:10.1088/0305-4470/30/9/007
Abstract
We compute the Form Factors of the relevant scaling operators in a class of integrable models without internal symmetries by exploiting their cluster properties. Their identification is established by computing the corresponding anomalous dimensions by means of Delfino--Simonetti--Cardy sum--rule and further confirmed by comparing some universal ratios of the nearby non--integrable quantum field theories with their independent numerical determination.
Latex file, 35 pages with 5 Postscript figures