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arXiv · 2111.01517

The Soft Anomalous Dimension at four loops in the Regge Limit

Niamh Maher·Giulio Falcioni·Einan Gardi·Calum Milloy·Leonardo Vernazza
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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 $2\to2$ 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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Niamh Maher, Giulio Falcioni, Einan Gardi, Calum Milloy, Leonardo Vernazza. 2021-11-02. The Soft Anomalous Dimension at four loops in the Regge Limit. https://arxiv.org/abs/2111.01517

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