Tree-level soft emission for two pairs of quarks

Xinguang Chen; Zhengwen Liu

Tree-level soft emission for two pairs of quarks

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arxiv 2411.08795 v2 pith:GRG47IHQ submitted 2024-11-13 hep-ph hep-th

Xinguang Chen , Zhengwen Liu This is my paper

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keywords correlationscomputecurrentemissionpairssofttree-levelanalyzing

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We compute the tree-level current for the emission of two soft quark-antiquark pairs in a hard scattering. We also compute the square of this current and discuss the resulting color correlations, featuring dipole correlations and three-parton correlations. This object is essential for analyzing the infrared singularities at next-to-next-to-next-to-next-to-leading-order (N4LO) predictions in perturbative QCD.

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Regge factorization of tree-level QCD amplitudes using a minimal set of lightcone variables
hep-ph 2025-06 conditional novelty 6.0 of 10

All tree-level QCD multi-Regge emission vertices with up to four final-state partons are extracted in a minimal lightcone-variable frame and collected in the MREV Mathematica library.

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