We study the elliptic double-box integral, which contributes to generic massless QFTs and is the only contribution to a particular 10-point scattering amplitude in N=4 SYM theory. Based on a Feynman parametrization, we express this integral in terms of elliptic polylogarithms. We then study its symbol, finding a rich structure and remarkable similarity with the non-elliptic case. In particular, the first entry of the symbol is expressible in terms of logarithms of dual-conformal cross-ratios, and elliptic letters only occur in the last two entries. Moreover, the symbol makes manifest a differential equation relating the double-box integral to a 6D hexagon integral, suggesting that it can be bootstrapped based on the latter integral alone.
@article{arxiv.2106.14902,
title = {The elliptic double box and symbology beyond polylogarithms},
author = {Alexander Kristensson and Matthias Wilhelm and Chi Zhang},
journal= {arXiv preprint arXiv:2106.14902},
year = {2022}
}
Comments
5 pages + references and supplementary material, 2 figures, 4 ancillary files; v2: references added, identities now proven