Measurement of the angle between jet axes in pp collisions at √s=5.02 TeV



Acharya, S, Adamova, D, Adler, A, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1027 more authors) (2023) Measurement of the angle between jet axes in pp collisions at √s=5.02 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2023 (7). 201-. ISSN 1029-8479, 1029-8479

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Abstract

This article reports measurements of the angle between differently defined jet axes in pp collisions at s = 5.02 TeV carried out by the ALICE Collaboration. Charged particles at midrapidity are clustered into jets with resolution parameters R = 0.2 and 0.4. The jet axis, before and after Soft Drop grooming, is compared to the jet axis from the Winner-Takes-All (WTA) recombination scheme. The angle between these axes, ∆R <inf>axis</inf>, probes a wide phase space of the jet formation and evolution, ranging from the initial high-momentum-transfer scattering to the hadronization process. The ∆R <inf>axis</inf> observable is presented for 20 < pTchjet < 100 GeV/c, and compared to predictions from the PYTHIA 8 and Herwig 7 event generators. The distributions can also be calculated analytically with a leading hadronization correction related to the non-perturbative component of the Collins-Soper-Sterman (CSS) evolution kernel. Comparisons to analytical predictions at next-to-leading-logarithmic accuracy with leading hadronization correction implemented from experimental extractions of the CSS kernel in Drell-Yan measurements are presented. The analytical predictions describe the measured data within 20% in the perturbative regime, with surprising agreement in the non-perturbative regime as well. These results are compatible with the universality of the CSS kernel in the context of jet substructure. [Figure not available: see fulltext.].

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron Scattering, Jet Substructure and Boosted Jets
Depositing User: Symplectic Admin
Date Deposited: 13 Aug 2024 12:58
Last Modified: 16 Jun 2026 14:21
DOI: 10.1007/JHEP07(2023)201
Open Access URL: https://doi.org/10.1007/JHEP07(2023)201
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3183656
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