Reggeon cuts in QCD amplitudes with negative signature

Abstract

Reggeon cuts in QCD amplitudes with negative signature are discussed. These cuts appear in the next-to-next-to-leading logarithmic approximation (NNLLA) and greatly complicate the derivation of the BFKL equation. Feynman diagrams responsible for appearance of these cuts are indicated and the cut contributions are calculated in the two- and three-loop approximation.

13 pages, 4 Figures; some typos corrected, two Figures and some explanations added; results unchanged

References in corpus (1)

• Analyzing high-energy factorization beyond next-to-leading logarithmic accuracy

Cited by in corpus (13)

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• Computing one-loop corrections to effective vertices with two scales in the EFT for Multi-Regge processes in QCD
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• The gluon Regge trajectory at three loops from planar Yang-Mills theory
• Climbing three-Reggeon ladders: four-loop amplitudes in the high-energy limit in full colour
• The SAGEX Review on Scattering Amplitudes, Chapter 15: The Multi-Regge Limit
• A Collinear Perspective on the Regge Limit
• On correlators of Reggeon fields and operators of Wilson lines in high energy QCD
• The two-loop Higgs impact factor
• One-loop impact factor for the emission of two gluons
• Regge poles and cuts and the Lipatov vertex
• One-loop central-emission vertex for two gluons in $\mathcal{N}=4$ super Yang-Mills theory