The Soft Anomalous Dimension at four loops in the Regge Limit

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 $2\to2$ scattering (through Next-to-Next-to-Leading Logarithms) in full colour to a general form for the...

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Detalles Bibliográficos
Autores principales: Maher, Niamh, Falcioni, Giulio, Gardi, Einan, Milloy, Calum, Vernazza, Leonardo
Lenguaje:eng
Publicado: 2021
Materias:
hep-th
Particle Physics - Theory
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.21468/SciPostPhysProc.7.013
http://cds.cern.ch/record/2789646
Descripción
Sumario: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 $2\to2$ 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.

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