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Forward-central two-particle correlations in p-Pb collisions at √sNN = 5.02 TeV

Adam, J. ; Christiansen, Peter LU ; Ljunggren, Martin LU ; Oskarsson, Anders LU ; Silvermyr, David LU orcid ; Sogaard, Carsten LU ; Stenlund, Evert LU ; Vislavicius, Vytautas LU and Zyzak, M. (2016) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753. p.126-139
Abstract
Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 < |η| < 4.0) and associated particles in the central range (|η| < 1.0) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like... (More)
Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 < |η| < 4.0) and associated particles in the central range (|η| < 1.0) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum (pT) dependence in p-going (p-Pb) and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by about 16 ± 6%, rather independent of pT within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different pT and η dependence than observed in the data. The results are sensitive to the parent particle v2 and composition of reconstructed muon tracks, where the contribution from heavy flavour decays is expected to dominate at pT>2 GeV/c. © 2015 CERN for the benefit of the ALICE Collaboration. (Less)
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publishing date
type
Contribution to journal
publication status
published
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
753
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:84949652232
ISSN
0370-2693
DOI
10.1016/j.physletb.2015.12.010
language
English
LU publication?
yes
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Export Date: 30 March 2022; Cited By: 48
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f2b28963-92f1-426c-8442-4af38c60de21
date added to LUP
2022-03-30 12:40:17
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2023-01-17 04:13:59
@article{f2b28963-92f1-426c-8442-4af38c60de21,
  abstract     = {{Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 &lt; |η| &lt; 4.0) and associated particles in the central range (|η| &lt; 1.0) are measured with the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger particles are reconstructed using the muon spectrometer, and the associated particles by the central barrel tracking detectors. In high-multiplicity events, the double-ridge structure, previously discovered in two-particle angular correlations at midrapidity, is found to persist to the pseudorapidity ranges studied in this Letter. The second-order Fourier coefficients for muons in high-multiplicity events are extracted after jet-like correlations from low-multiplicity events have been subtracted. The coefficients are found to have a similar transverse momentum (pT) dependence in p-going (p-Pb) and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by about 16 ± 6%, rather independent of pT within the uncertainties of the measurement. The data are compared with calculations using the AMPT model, which predicts a different pT and η dependence than observed in the data. The results are sensitive to the parent particle v2 and composition of reconstructed muon tracks, where the contribution from heavy flavour decays is expected to dominate at pT&gt;2 GeV/c. © 2015 CERN for the benefit of the ALICE Collaboration.}},
  author       = {{Adam, J. and Christiansen, Peter and Ljunggren, Martin and Oskarsson, Anders and Silvermyr, David and Sogaard, Carsten and Stenlund, Evert and Vislavicius, Vytautas and Zyzak, M.}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  pages        = {{126--139}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Forward-central two-particle correlations in p-Pb collisions at √sNN = 5.02 TeV}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2015.12.010}},
  doi          = {{10.1016/j.physletb.2015.12.010}},
  volume       = {{753}},
  year         = {{2016}},
}