This article is cited in 8 papers

The form factor program: A review and new results, the nested $SU(N)$ off-shell Bethe ansatz and the $1/N$ expansion

H. M. Babujian^a, A. Foerster^b, M. Karowski<sup>c

a</sup> Yerevan Physics Institute
^b Instituto de Fisica, Universidade Federal do Rio Grande do Sul
^c Freie Universität Berlin

Abstract: The purpose of the "bootstrap program" for integrable quantum field theories in $1{+}1$ dimensions is to construct a model explicitly in terms of its Wightman functions. We illustrate this program here mainly in terms of the $SU(N)$ Gross–Neveu model. We construct the nested off-shell Bethe ansatz for an $SU(N)$ factoring $S$-matrix and consider the problem of how to sum over intermediate states in the short-distance limit of the two-point Wightman function for the sinh-Gordon model.

Keywords: integrable quantum field theory, form factor.

DOI: 10.4213/tmf6189

 English version: Theoretical and Mathematical Physics, 2008, 155:1, 512–522

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