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Differential two-particle number and momentum correlations with the AMPT, UrQMD, and EPOS models in Pb-Pb collisions at √sNN= 2.76 TeV

Basu, Sumit LU orcid ; Gonzalez, Victor ; Pan, Jinjin ; Knospe, Anders ; Marin, Ana ; Markert, Christina and Pruneau, Claude (2021) In Physical Review C 104.
Abstract
We report studies of charge-independent (CI) and charge-dependent (CD)two-particle differential number correlation functions, R2 (Δη,Δ℘), and transverse momentum correlation functions, P2 (Δη,Δ℘) of charged particles produced in Pb-Pb collisions at the LHC centre-of-mass energy √sNN= 2.76 TeV with the UrQMD, AMPT and EPOS models. Model predictions for R2 and P2 correlation functions are presented for inclusive charged hadrons (h±) in selected transverse momentum ranges and with full azimuthal coverage in the pseudorapidity range |η|<1.0. We compare these predictions for the strength, shape, and particularly the width of the... (More)
We report studies of charge-independent (CI) and charge-dependent (CD)two-particle differential number correlation functions, R2 (Δη,Δ℘), and transverse momentum correlation functions, P2 (Δη,Δ℘) of charged particles produced in Pb-Pb collisions at the LHC centre-of-mass energy √sNN= 2.76 TeV with the UrQMD, AMPT and EPOS models. Model predictions for R2 and P2 correlation functions are presented for inclusive charged hadrons (h±) in selected transverse momentum ranges and with full azimuthal coverage in the pseudorapidity range |η|<1.0. We compare these predictions for the strength, shape, and particularly the width of the correlation functions with recent measurements of these observables by the ALICE collaboration. Our analysis indicate that comparative studies of R2 and P2 correlation functions provide valuable insight towards the understanding of particle production in Pb-Pb collisions. We find, in particular, that these models have quantitatively different predictions for these three observables but none reproduce the measured correlation functions reported by the ALICE collaboration. Accounting for quantum number conservation in models, particularly charge conservation, is mandatory to reproduce the detailed measurements of number and transverse momentum correlation function. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
104
article number
064902
pages
14 pages
publisher
American Physical Society
external identifiers
  • scopus:85121149966
ISSN
2469-9985
DOI
10.1103/PhysRevC.104.064902
language
English
LU publication?
yes
id
065968bf-7fdb-49d3-90b5-43b647a80f1b
alternative location
https://arxiv.org/pdf/2001.07167.pdf
date added to LUP
2021-04-12 16:03:47
date last changed
2023-04-02 20:59:09
@article{065968bf-7fdb-49d3-90b5-43b647a80f1b,
  abstract     = {{We report studies of charge-independent (CI) and charge-dependent (CD)two-particle differential number correlation functions, <i>R</i><sub>2</sub> (Δη,Δ℘), and transverse momentum correlation functions, <i>P</i><sub>2</sub> (Δη,Δ℘) of charged particles produced in Pb-Pb collisions at the LHC centre-of-mass energy <sub>√</sub><i>s</i><sub>NN</sub>= 2.76 TeV with the UrQMD, AMPT and EPOS models. Model predictions for <i>R</i><sub>2</sub> and <i>P</i><sub>2</sub> correlation functions are presented for inclusive charged hadrons (<i>h</i>±) in selected transverse momentum ranges and with full azimuthal coverage in the pseudorapidity range |<i>η</i>|&lt;1.0. We compare these predictions for the strength, shape, and particularly the width of the correlation functions with recent measurements of these observables by the ALICE collaboration. Our analysis indicate that comparative studies of <i>R</i><sub>2</sub> and <i>P</i><sub>2</sub> correlation functions provide valuable insight towards the understanding of particle production in Pb-Pb collisions. We find, in particular, that these models have quantitatively different predictions for these three observables but none reproduce the measured correlation functions reported by the ALICE collaboration. Accounting for quantum number conservation in models, particularly charge conservation, is mandatory to reproduce the detailed measurements of number and transverse momentum correlation function.}},
  author       = {{Basu, Sumit and Gonzalez, Victor and Pan, Jinjin and Knospe, Anders and Marin, Ana and Markert, Christina and Pruneau, Claude}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  month        = {{12}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Differential two-particle number and momentum correlations with the AMPT, UrQMD, and EPOS models in Pb-Pb collisions at √<i>s</i><sub>NN</sub>= 2.76 TeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.104.064902}},
  doi          = {{10.1103/PhysRevC.104.064902}},
  volume       = {{104}},
  year         = {{2021}},
}