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 t...
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| Format: | Article |
| Language: | English |
| Published: |
SciPost
2022-06-01
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| Series: | SciPost Physics Proceedings |
| Online Access: | https://scipost.org/SciPostPhysProc.7.013 |
| Summary: | 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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| ISSN: | 2666-4003 |