Singularities of the Magnon Boundstate S-Matrix

Abstract

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.

32 pages, 9 figures

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• The S-matrix of String Bound States
• Finite-Size Effects for Dyonic Giant Magnons
• A Relativistic Relative of the Magnon S-Matrix
• Giant Magnons on CP^3 by Dressing Method
• Magnon like solutions for strings in I-brane background
• Aspects of Integrability in AdS/CFT Duality
• Issues on magnon reflection
• Spiky Strings on NS5-branes
• Semiclassical strings in AdS(3) X S^2
• Conformal SO(2,4) Transformations for the Helical AdS String Solution
• Reflection algebra, Yangian symmetry and bound-states in AdS/CFT
• Semiclassical Strings on Curved Branes
• Semiclassical Strings in Supergravity PFT
• Rotating and Orbiting Strings in Dp-brane background
• Perturbations of giant magnons and single spikes in $\mathbb{R}\times S^2$