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The nested SU(N) off-shell Bethe ansatz and exact form factors

Hratchia M. Babujian, Angela Foerster, Michael Karowski

hep-tharXiv:hep-th/0611012

Abstract

The form factor equations are solved for an SU(N) invariant S-matrix under the assumption that the anti-particle is identified with the bound state of N-1 particles. The solution is obtained explicitly in terms of the nested off-shell Bethe ansatz where the contribution from each level is written in terms of multiple contour integrals.

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