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The bound state S-matrix for \(AdS_{5}\times S^{5}\) superstring. (English) Zbl 1194.81181

Summary: We determine the S-matrix that describes scattering of arbitrary bound states in the light-cone string theory in \(AdS_{5}\times S^{5}\). The corresponding construction relies on the Yangian symmetry and the superspace formalism for the bound state representations. The basic analytic structure supporting the S-matrix entries turns out to be the hypergeometric function \({}_4F_3\). We show that for particular bound state numbers it reproduces all the scattering matrices previously obtained in the literature. Our findings should be relevant for the TBA and Lüscher approaches to the finite-size spectral problem. They also shed some light on the construction of the universal R-matrix for the centrally-extended \({\mathfrak psu}(2|2)\) superalgebra.

MSC:

81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory
81T60 Supersymmetric field theories in quantum mechanics
81U05 \(2\)-body potential quantum scattering theory
81U20 \(S\)-matrix theory, etc. in quantum theory
17A70 Superalgebras

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