Singularities of the Magnon Boundstate S-Matrix

Details Singularities of the Magnon Boundstate S-Matrix Singularities of the Magnon Boundstate S-Matrix

2007-12-25

arxiv.org/abs/0712.4068v1

JHEP 0803:037,2008

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 9 figures

Scientific paper

10.1088/1126-6708/2008/03/037

We study the conjectured exact S-matrix for the scattering of BPS magnon boundstates in the spin-chain description of planar N=4 SUSY Yang-Mills. The conjectured S-matrix exhibits both simple and double poles at complex momenta. Some of these poles lie parametrically close to the real axis in momentum space on the branch where particle energies are positive. We show that all such poles are precisely accounted for by physical processes involving one or more on-shell intermediate particles belonging to the known BPS spectrum.

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