QCD splitting functions beyond kinematical limits

We present a systematic decomposition of QCD splitting functions into scalar dipole radiators and pure splitting remainders up to second order in the strong coupling. The individual components contain terms that are formally subleading in soft or collinear scaling parameters, but well understood and universal due to their origin in scalar QCD. The multipole radiator functions which we derive share essential features of the known double-soft and one-loop soft gluon currents, and are not based on kinematical approximations.

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Publication Details

Journal
Physical review. D/Physical review. D.
Published
2026-01-29
DOI
https://doi.org/10.1103/f5c5-hsdd
Primary Topic
Quantum Chromodynamics and Particle Interactions
Type
article
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article

QCD splitting functions beyond kinematical limits

Anonymous
Physical review. D/Physical review. D.
Quantum Chromodynamics and Particle Interactions
article

QCD splitting functions beyond kinematical limits

Anonymous
article en

Abstract

We present a systematic decomposition of QCD splitting functions into scalar dipole radiators and pure splitting remainders up to second order in the strong coupling. The individual components contain terms that are formally subleading in soft or collinear scaling parameters, but well understood and universal due to their origin in scalar QCD. The multipole radiator functions which we derive share essential features of the known double-soft and one-loop soft gluon currents, and are not based on kinematical approximations.

Physical review. D/Physical review. D.Vol. 113(5)
Fermi National Accelerator Laboratory (US), European Organization for Nuclear Research (CH), University of Göttingen (DE)
Openalex Percentile: Top 70%
Quantum Chromodynamics and Particle Interactions
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