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arXiv · 1109.0058

Wilson Loops @ 3-Loops in Special Kinematics

Paul Heslop·Valentin V. Khoze
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Abstract

We obtain a compact expression for the octagon MHV amplitude / Wilson loop at 3 loops in planar N=4 SYM and in special 2d kinematics in terms of 7 unfixed coefficients. We do this by making use of the cyclic and parity symmetry of the amplitude/Wilson loop and its behaviour in the soft/collinear limits as well as in the leading term in the expansion away from this limit. We also make a natural and quite general assumption about the functional form of the result, namely that it should consist of weight 6 polylogarithms whose symbol consists of basic cross-ratios only (and not functions thereof). We also describe the uplift of this result to 10 points.

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Paul Heslop, Valentin V. Khoze. 2011-09-01. Wilson Loops @ 3-Loops in Special Kinematics. https://doi.org/10.1007/jhep11(2011)152

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