paper

mirror TBA equations from Y-system and discontinuity relations

arXiv:1104.4054 · doi:10.1007/JHEP08(2011)095

Abstract

Using the recently proposed set of discontinuity relations we translate the AdS/CFT Y-system to TBA integral equations and quantization conditions for a large subset of excited states from the sl(2) sector of the string sigma-model. Our derivation provides an analytic proof of the fact that the exact Bethe equations reduce to the Beisert-Staudacher equations in the asymptotic limit. We also construct the corresponding T-system and show that in the language of T-functions the energy formula reduces to a single term which depends on a single T-function.

67 pages, 4 figures; appendices added (published version)

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