2009/05/27 by Henriette Elvang, Daniel Z. Freedman, Michael Kiermaier
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1007/jhep03(2010)075
20 pages, 2 figures
arxiv created 2009/05/27 · arxiv updated 2015/05/13
We prove that 1-loop n-point NMHV superamplitudes in N=4 SYM theory are dual conformal covariant for all numbers n of external particles (after regularization and subtraction of IR divergences). This property was previously established for n < 10 in arXiv:0808.0491. We derive an explicit representation of these superamplitudes in terms of dual conformal cross-ratios. We also show that all the 1-loop `box coefficients' obtained from maximal cuts of NkMHV n-point functions are covariant under dual conformal transformations.