Structure of non-global logarithms with Cambridge/Aachen clustering, by Kamel Khelifa-Kerfa

SciPost Physics Home Authoring Refereeing Submit a manuscript About Structure of non-global logarithms with Cambridge/Aachen clustering Kamel Khelifa-Kerfa SciPost Phys. 20, 094 (2026) · published 1 April 2026 doi: 10.21468/SciPostPhys.20.4.094 pdf BiBTeX RIS Submissions/Reports 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 for the case of the dijet invariant mass. The resulting expressions include full colour and complete jet-radius dependence. Compared to the anti-$k_t$ and $k_t$ clustering algorithms, the C/A distribution minimises the impact of these non-global logarithms, making it the preferred choice among the three algorithms. × TY - JOURPB - SciPost FoundationDO - 10.21468/SciPostPhys.20.4.094TI - Structure of non-global logarithms with Cambridge/Aachen clusteringPY - 2026/04/01UR - https://scipost.org/SciPostPhys.20.4.094JF - SciPost PhysicsJA - SciPost Phys.VL - 20IS - 4SP - 094A1 - Khelifa-Kerfa, KamelAB - 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 for the case of the dijet invariant mass. The resulting expressions include full colour and complete jet-radius dependence. Compared to the anti-$k_t$ and $k_t$ clustering algorithms, the C/A distribution minimises the impact of these non-global logarithms, making it the preferred choice among the three algorithms.ER - × @Article{10.21468/SciPostPhys.20.4.094, title={{Structure of non-global logarithms with Cambridge/Aachen clustering}}, author={Kamel Khelifa-Kerfa}, journal={SciPost Phys.}, volume={20}, pages={094}, year={2026}, publisher={SciPost}, doi={10.21468/SciPostPhys.20.4.094}, url={https://scipost.org/10.21468/SciPostPhys.20.4.094},} Disclosure of Generative AI use The author(s) disclose that the following generative AI tools have been used in the preparation of this publication Help in writing the python code. Proofreading the manuscript. Ontology / Topics See full Ontology or Topics database.

Gluons Jets Large Hadron Collider (LHC) Quantum chromodynamics (QCD) Author / Affiliations: mappings to Contributors and Organizations See all Organizations. 1 2 3 Kamel Khelifa-Kerfa 1 جامعة أحمد زبانة - غليزان / University Ahmed Zabana of Relizane [CUR] 2 جامعة يحي فارس بالمدية / University Yahia Fares of Medea 3 جامعة حسيبة بن بوعلي -الشلف / Hassiba Benbouali University of Chlef