In this Letter we show that under BCFW-deformation the large- z behavior of permutation sum of color-ordered gluon amplitudes found by Boels and Isermann in arxiv:1109.5888 can be simply understood from the well known Kleiss-Kuijf relation and Bern-Carrasco-Johansson relation. © 2011 Elsevier B.V.
Du, Y. J., Feng, B., & Fu, C. H. (2012). Note on permutation sum of color-ordered gluon amplitudes. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 706(4–5), 490–494. https://doi.org/10.1016/j.physletb.2011.11.063