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

Acharya, S. ; Basu, S. LU orcid ; Christiansen, P. LU ; Matonoha, O. LU ; Nassirpour, A.F. LU orcid ; Ohlson, A. LU ; Rueda, O.V. LU ; Silvermyr, D. LU orcid ; Staa, J. LU and Vislavicius, V. LU , et al. (2023) In Journal of High Energy Physics 2023(7).
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 axis, 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 axis observable is presented for 20 < pTchjet < 100 GeV/c, and compared to predictions from the PYTHIA 8 and Herwig 7 event generators. The distributions... (More)
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 axis, 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 axis 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.]. © 2023, The Author(s). (Less)
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Contribution to journal
publication status
published
subject
keywords
Hadron-Hadron Scattering, Jet Substructure and Boosted Jets
in
Journal of High Energy Physics
volume
2023
issue
7
article number
201
publisher
Springer
external identifiers
  • scopus:85166272786
ISSN
1029-8479
DOI
10.1007/JHEP07(2023)201
language
English
LU publication?
yes
id
710b22ea-557a-4671-b071-691e52f0ff45
date added to LUP
2023-12-22 15:14:38
date last changed
2023-12-22 15:15:33
@article{710b22ea-557a-4671-b071-691e52f0ff45,
  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 axis, 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 axis observable is presented for 20 &lt; pTchjet &lt; 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.]. © 2023, The Author(s).}},
  author       = {{Acharya, S. and Basu, S. and Christiansen, P. and Matonoha, O. and Nassirpour, A.F. and Ohlson, A. and Rueda, O.V. and Silvermyr, D. and Staa, J. and Vislavicius, V. and Zurlo, N.}},
  issn         = {{1029-8479}},
  keywords     = {{Hadron-Hadron Scattering; Jet Substructure and Boosted Jets}},
  language     = {{eng}},
  number       = {{7}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Measurement of the angle between jet axes in pp collisions at √s = 5.02 TeV}},
  url          = {{http://dx.doi.org/10.1007/JHEP07(2023)201}},
  doi          = {{10.1007/JHEP07(2023)201}},
  volume       = {{2023}},
  year         = {{2023}},
}