Gravitational Scattering in the High-Energy Limit

Understand

Any gravitational scattering amplitude takes a remarkably simple factorized form at tree level in multi-Regge kinematics (MRK), where the produced particles are strongly ordered in rapidity.

• Very recently, it was shown that also the scattering equations have a very simple structure in MRK.
• In this paper we study Einstein gravity amplitudes in MRK in the framework of the scattering equations.
• We present a new derivation of the multi-Regge factorization of tree-level amplitudes with any number of external gravitons and any helicity configuration.