Abstract
We revisit the calculation of instanton effects in correlation functions in \( \mathcal{N}=4 \) SYM involving the Konishi operator and operators of twist two. Previous studies revealed that the scaling dimensions and the OPE coefficients of these operators do not receive instanton corrections in the semiclassical approximation. We go beyond this approximation and demonstrate that, while operators belonging to the same \( \mathcal{N}=4 \) supermultiplet ought to have the same conformal data, the evaluation of quantum instanton corrections for one operator can be mapped into a semiclassical computation for another operator in the same supermultiplet. This observation allows us to compute explicitly the leading instanton correction to the scaling dimension of operators in the Konishi supermultiplet as well as to their structure constants in the OPE of two half-BPS scalar operators. We then use these results, together with crossing symmetry, to determine instanton corrections to scaling dimensions of twist-four operators with large spin.
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ArXiv ePrint: 1605.06346
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Alday, L.F., Korchemsky, G.P. Revisiting instanton corrections to the Konishi multiplet. J. High Energ. Phys. 2016, 5 (2016). https://doi.org/10.1007/JHEP12(2016)005
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DOI: https://doi.org/10.1007/JHEP12(2016)005