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arXiv · 2411.08795

Tree-level soft emission for two pairs of quarks

Xinguang Chen·Zhengwen Liu
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Abstract

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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Xinguang Chen, Zhengwen Liu. 2024-11-13. Tree-level soft emission for two pairs of quarks. https://arxiv.org/abs/2411.08795

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