TL;DR
This paper derives and analyzes the S-matrix for the su(2|3) dynamic spin chain and planar N=4 super Yang-Mills, confirming the asymptotic Bethe equations through diagonalization and symmetry constraints.
Contribution
It provides a derivation and validation of the asymptotic Bethe equations for the su(2|3) dynamic spin chain and N=4 SYM, using symmetry constraints to fully determine the S-matrix.
Findings
S-matrix fully constrained by residual symmetry
Diagonalization yields Bethe equations for periodic states
Confirms earlier proposals for asymptotic Bethe equations
Abstract
We derive and investigate the S-matrix for the su(2|3) dynamic spin chain and for planar N=4 super Yang-Mills. Due to the large amount of residual symmetry in the excitation picture, the S-matrix turns out to be fully constrained up to an overall phase. We carry on by diagonalising it and obtain Bethe equations for periodic states. This proves an earlier proposal for the asymptotic Bethe equations for the su(2|3) dynamic spin chain and for N=4 SYM.
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