Infrared behaviour of the one-loop scattering equations and supergravity integrands
Infrared behaviour of the one-loop scattering equations and supergravity integrands
The recently introduced ambitwistor string led to a striking proposal for one-loop maximal supergravity amplitudes, localised on the solutions of the ambitwistor one-loop scattering equations. However, these amplitudes have not been explicitly analysed, due to the apparent complexity of the equations that determine the localisation. In this paper we propose …