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SIGMA 2 (2006), 082, 16 pages hep-th/0609130
https://doi.org/10.3842/SIGMA.2006.082
Contribution to the Proceedings of the O'Raifeartaigh Symposium
The Form Factor Program: a Review and New Results − the Nested SU(N) Off-Shell Bethe Ansatz
Hratchya M. Babujian a, Angela Foerster b and Michael Karowski c
a) Yerevan Physics Institute, Alikhanian Brothers 2, Yerevan, 375036, Armenia
b) Instituto de Física da UFRGS, Av. Bento
Gonçalves 9500, Porto Alegre, RS - Brazil
c) Theoretische Physik, Freie Universität Berlin,
Arnimallee 14, 14195 Berlin, Germany
Received September 29, 2006, in final form
November 16, 2006; Published online November 23, 2006
Abstract
The purpose of the ''bootstrap program'' for integrable
quantum field theories in 1+1 dimensions is to construct
explicitly a model in terms of its Wightman functions. In this
article, this program is mainly illustrated in terms of the
sinh-Gordon model and the SU(N) Gross-Neveu model. The nested
off-shell Bethe ansatz for an SU(N) factorizing S-matrix is
constructed. We review some previous results on sinh-Gordon form
factors and the quantum operator field equation. The problem of
how to sum over intermediate states is considered in the short
distance limit of the two point Wightman function for the
sinh-Gordon model.
Key words:
integrable quantum field theory; form factors.
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