Fring, A., Mussardo, G. & Simonetti, P. (1993). Form Factors for Integrable Lagrangian Field Theories, the SinhGordon Model. Nuclear Physics B, 393(12), pp. 413441. doi: 10.1016/05503213(93)90252K

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Abstract
Using Watson's and the recursive equations satisfied by matrix elements of local operators in twodimensional integrable models, we compute the form factors of the elementary field $\phi(x)$ and the stressenergy tensor $T_{\mu\nu}(x)$ of SinhGordon theory. Form factors of operators with higher spin or with different asymptotic behaviour can easily be deduced from them. The value of the correlation functions are saturated by the form factors with lowest number of particle terms. This is illustrated by an application of the form factors of the trace of $T_{\mu\nu}(x)$ to the sum rule of the $c$theorem.
Item Type:  Article 

Subjects:  Q Science > QC Physics 
Divisions:  School of Engineering & Mathematical Sciences > Department of Mathematical Science 
URI:  http://openaccess.city.ac.uk/id/eprint/961 
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