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hep-ph2008★ 41 cited
Polynomial Structures in One-Loop Amplitudes
Ruth Britto, Bo Feng, Gang Yang
A general one-loop scattering amplitude may be expanded in terms of master integrals. The coefficients of the master integrals can be obtained from tree-level input in a two-step p…
hep-ph2006★ 243 cited
D-dimensional unitarity cut method
Charalampos Anastasiou, Ruth Britto, Bo Feng +2
We develop a unitarity method to compute one-loop amplitudes with massless propagators in d=4-2*epsilon dimensions. We compute double cuts of the loop amplitudes via a decompositio…