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arXiv · 1312.3916

Simplifying instanton corrections to N=4 SYM correlators

Massimo Bianchi·Andreas Brandhuber·Gabriele Travaglini·Congkao Wen
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Abstract

We compute instanton corrections to non-minimal correlation functions of chiral primary operators in the N=4 super Yang-Mills super-current multiplet. Using a representation in terms of Mellin integrals, we find that these corrections can be written as conformal integrals in AdS_5 times certain "kinematic" prefactors that are independent of the instanton moduli. We then consider the consecutive, pairwise light-like limit x_{i, i+1}^2 -> 0 of such correlators, and prove that the ratio between the instanton contribution and the corresponding tree-level expression vanishes in this limit. We also speculate on the extension to the non-perturbative level of the proposed duality with polygonal Wilson loops and briefly discuss its potential implications for scattering amplitudes.

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Massimo Bianchi, Andreas Brandhuber, Gabriele Travaglini, Congkao Wen. 2014-03-24. Simplifying instanton corrections to N=4 SYM correlators. https://doi.org/10.1007/jhep04(2014)101

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