Measurement of the angle between jet axes in pp collisions at s√ = 5.02 TeV
ALICE Collaboration. (2023). Measurement of the angle between jet axes in pp collisions at s√ = 5.02 TeV. Journal of High Energy Physics, 2023(7), Article 201. https://doi.org/10.1007/JHEP07(2023)201
Julkaistu sarjassa
Journal of High Energy PhysicsTekijät
Päivämäärä
2023Tekijänoikeudet
© CERN, for the benefit of the ALICE Collaboration. Article funded by SCOAP3.
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, ∆Raxis, probes a wide phase space of the jet formation and evolution, ranging from the initial high-momentum-transfer scattering to the hadronization process. The ∆Raxis observable is presented for 20 < pTch jet < 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.
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SpringerISSN Hae Julkaisufoorumista
1126-6708Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/184468556
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