65 citations · 303 across the 11 of their papers we have counts for
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hep-th2014★ 44 cited
Elliptic Functions and Maximal Unitarity
Mads Sogaard, Yang Zhang
Scattering amplitudes at loop level can be reduced to a basis of linearly independent Feynman integrals. The integral coefficients are extracted from generalized unitarity cuts whi…
hep-th2014★ 12 cited
Massive Nonplanar Two-Loop Maximal Unitarity
Mads Sogaard, Yang Zhang
We explore maximal unitarity for nonplanar two-loop integrals with up to four massive external legs. In this framework, the amplitude is reduced to a basis of master integrals whos…
hep-th2014★ 27 cited
Unitarity Cuts of Integrals with Doubled Propagators
Mads Sogaard, Yang Zhang
We extend the notion of generalized unitarity cuts to accommodate loop integrals with higher powers of propagators. Such integrals frequently arise in for example integration-by-pa…