IAS Amplitudes Group Meeting

Abstract: Scattering amplitudes can be used to probe the all-orders structure of gauge theories. Particularly rich is the non-planar sector, where physical phenomena such as quadrupole radiation and multi-reggeon interactions appear. In this talk I will present amplitudes which offer a window on these structures within QCD and Yang-Mills. I will also describe how infrared divergences can be used to decompose the space of Feynman integrals and obtain more compact representations of non-supersymmetric amplitudes.