Dual conformal symmetry of 1 - loop NMHV amplitudes in N = 4 SYM theory
نویسندگان
چکیده
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 ≤ 9 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 NMHV n-point functions are covariant under dual conformal transformations. ar X iv :0 90 5. 43 79 v1 [ he pth ] 2 7 M ay 2 00 9
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تاریخ انتشار 2009