SciPost Submission Page
Structure of non-global logarithms with Cambridge/Aachen clustering
by Kamel Khelifa-Kerfa
Submission summary
| Authors (as registered SciPost users): | Kamel Khelifa-Kerfa |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202511_00053v1 (pdf) |
| Date submitted: | Nov. 22, 2025, 12:33 p.m. |
| Submitted by: | Kamel Khelifa-Kerfa |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Computational, Phenomenological |
The author(s) disclose that the following generative AI tools have been used in the preparation of this submission:
Help in writing the python code
Proofreading the manuscript
Abstract
We determine the structure of both Abelian and non-Abelian non-global logarithms up to four loops for e+e− processes in perturbative QCD, where final-state jets are defined using the Cambridge-Aachen (C/A) clustering algorithm. The calculations are performed within the soft (eikonal) approximation using strong-energy ordering of the final-state partons. The resulting expressions include full colour and complete jet-radius dependence. Compared to the anti-kt and kt clustering algorithms, the C/A distribution minimises the impact of these non-global logarithms, making it the preferred choice among the three algorithms.
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