Boundary scattering in the SU(N) principal chiral model on the half-line with conjugating boundary conditions

Details Boundary scattering in the SU(N) principal chiral model on the half-line with conjugating boundary conditions Boundary scattering in the SU(N) principal chiral model on the half-line with conjugating boundary conditions

2002-04-08

arxiv.org/abs/hep-th/0204072v1

Phys.Lett. B547 (2002) 257-268

Physics

High Energy Physics

High Energy Physics - Theory

14 pages

Scientific paper

10.1016/S0370-2693(02)02760-0

We investigate the SU(N) Principal Chiral Model on a half-line with a particular set of boundary conditions (BCs). In previous work these BCs have been shown to correspond to boundary scattering matrices (K-matrices) which are representation conjugating and whose matrix structure corresponds to one of the symmetric spaces SU(N)/SO(N) or SU(N)/Sp(N). Starting from the bulk particle spectrum and the K-matrix for a particle in the vector representation we construct K-matrices for particles in higher rank representations scattering off the boundary. We then perform an analysis of the physical strip pole structure and provide a complete set of boundary Coleman-Thun mechanisms for those poles which do not correspond to particles coupling to the boundary. We find that the model has no non-trivial boundary states.

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