Affiliation:
1. University of Edinburgh
2. University of Turin
3. European Organization for Nuclear Research
Abstract
The soft anomalous dimension governs the infrared divergences of
scattering amplitudes in general kinematics to all orders in
perturbation theory. By comparing the recent Regge-limit results for
2\to22→2
scattering (through Next-to-Next-to-Leading Logarithms) in full colour
to a general form for the soft anomalous dimension at four loops we
derive powerful constraints on its kinematic dependence, opening the way
for a bootstrap-based determination.
Funder
European Research Council
Horizon 2020
Ministero dell’Istruzione, dell’Università e della Ricerca
Science and Technology Facilities Council