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Azimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector

Aad, G ; Åkesson, T.P.A. LU orcid ; Doglioni, C. LU ; Ekman, P.A. LU ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid ; Poettgen, R. LU orcid and Simpson, N.D. LU , et al. (2024) In Physical Review Letters 132(20).
Abstract
Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Formula Presented and Formula Presented collisions at the LHC. The muons are measured with transverse momenta and pseudorapidities satisfying Formula Presented and Formula Presented, respectively. The distributions of azimuthal angle separation Formula Presented for muon pairs having pseudorapidity separation Formula Presented, are measured in different Formula Presented centrality intervals and compared to the same distribution measured in... (More)
Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Formula Presented and Formula Presented collisions at the LHC. The muons are measured with transverse momenta and pseudorapidities satisfying Formula Presented and Formula Presented, respectively. The distributions of azimuthal angle separation Formula Presented for muon pairs having pseudorapidity separation Formula Presented, are measured in different Formula Presented centrality intervals and compared to the same distribution measured in Formula Presented collisions at the same center-of-mass energy. Results are presented separately for muon pairs with opposite-sign charges, same-sign charges, and all pairs. A clear peak is observed in all Formula Presented distributions at Formula Presented, consistent with the parent heavy-quark pairs being produced via hard-scattering processes. The widths of that peak, characterized using Cauchy-Lorentz fits to the Formula Presented distributions, are found to not vary significantly as a function of Formula Presented collision centrality and are similar for Formula Presented and Formula Presented collisions. This observation will provide important constraints on theoretical descriptions of heavy-quark interactions with the quark-gluon plasma. © 2024 CERN, for the ATLAS Collaboration. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Colliding beam accelerators, Quantum theory, Tellurium compounds, Angular correlations, ATLAS detectors, Azimuthal angle, Heavy flavours, Heavy-quark, Measurements of, Muon pairs, Pseudorapidities, Quark-gluon plasma, Ultrarelativistic heavy ion collision, Heavy ions
in
Physical Review Letters
volume
132
issue
20
article number
202301
publisher
American Physical Society
external identifiers
  • scopus:85193942982
  • pmid:38829073
ISSN
0031-9007
DOI
10.1103/PhysRevLett.132.202301
language
English
LU publication?
yes
id
0a00db8d-c9c7-48b3-8719-fbebd2eeb0ad
date added to LUP
2024-08-22 10:21:35
date last changed
2025-04-04 14:13:35
@article{0a00db8d-c9c7-48b3-8719-fbebd2eeb0ad,
  abstract     = {{Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Formula Presented and Formula Presented collisions at the LHC. The muons are measured with transverse momenta and pseudorapidities satisfying Formula Presented and Formula Presented, respectively. The distributions of azimuthal angle separation Formula Presented for muon pairs having pseudorapidity separation Formula Presented, are measured in different Formula Presented centrality intervals and compared to the same distribution measured in Formula Presented collisions at the same center-of-mass energy. Results are presented separately for muon pairs with opposite-sign charges, same-sign charges, and all pairs. A clear peak is observed in all Formula Presented distributions at Formula Presented, consistent with the parent heavy-quark pairs being produced via hard-scattering processes. The widths of that peak, characterized using Cauchy-Lorentz fits to the Formula Presented distributions, are found to not vary significantly as a function of Formula Presented collision centrality and are similar for Formula Presented and Formula Presented collisions. This observation will provide important constraints on theoretical descriptions of heavy-quark interactions with the quark-gluon plasma. © 2024 CERN, for the ATLAS Collaboration.}},
  author       = {{Aad, G and Åkesson, T.P.A. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Simpson, N.D. and Smirnova, O. and Zwalinski, L.}},
  issn         = {{0031-9007}},
  keywords     = {{Colliding beam accelerators; Quantum theory; Tellurium compounds; Angular correlations; ATLAS detectors; Azimuthal angle; Heavy flavours; Heavy-quark; Measurements of; Muon pairs; Pseudorapidities; Quark-gluon plasma; Ultrarelativistic heavy ion collision; Heavy ions}},
  language     = {{eng}},
  number       = {{20}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Azimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.132.202301}},
  doi          = {{10.1103/PhysRevLett.132.202301}},
  volume       = {{132}},
  year         = {{2024}},
}