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Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV

Acharya, S. ; Basu, S. LU orcid ; Christiansen, P. LU ; Matonoha, O. LU ; Nassirpour, A.F. LU orcid ; Ohlson, A. LU ; Silvermyr, D. LU orcid ; Staa, J. LU ; Vazquez Rueda, O. LU and Vislavicius, V. LU , et al. (2024) In Journal of High Energy Physics 2024(8).
Abstract
The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV down to transverse momentum (pT) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v2 in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8σ at low pT, and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v2 coefficient is also found independent of pT within uncertainties. Comparisons with the inclusive charged-particle v2 and with AMPT... (More)
The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV down to transverse momentum (pT) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v2 in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8σ at low pT, and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v2 coefficient is also found independent of pT within uncertainties. Comparisons with the inclusive charged-particle v2 and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v2 in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models. © The Author(s) 2024. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Heavy Ion Experiments, Jets, Particle Correlations and Fluctuations
in
Journal of High Energy Physics
volume
2024
issue
8
article number
234
publisher
Springer
external identifiers
  • scopus:85202924771
ISSN
1029-8479
DOI
10.1007/JHEP08(2024)234
language
English
LU publication?
yes
id
4b865dab-90dc-4189-a299-49117fef7318
date added to LUP
2024-12-17 17:05:03
date last changed
2025-04-04 15:17:00
@article{4b865dab-90dc-4189-a299-49117fef7318,
  abstract     = {{The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV down to transverse momentum (pT) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v2 in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8σ at low pT, and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v2 coefficient is also found independent of pT within uncertainties. Comparisons with the inclusive charged-particle v2 and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v2 in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models. © The Author(s) 2024.}},
  author       = {{Acharya, S. and Basu, S. and Christiansen, P. and Matonoha, O. and Nassirpour, A.F. and Ohlson, A. and Silvermyr, D. and Staa, J. and Vazquez Rueda, O. and Vislavicius, V. and Zurlo, N.}},
  issn         = {{1029-8479}},
  keywords     = {{Heavy Ion Experiments; Jets; Particle Correlations and Fluctuations}},
  language     = {{eng}},
  number       = {{8}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV}},
  url          = {{http://dx.doi.org/10.1007/JHEP08(2024)234}},
  doi          = {{10.1007/JHEP08(2024)234}},
  volume       = {{2024}},
  year         = {{2024}},
}