CERN Accelerating science

Article
Report number arXiv:1504.04337 ; CERN-PH-EP-2015-032 ; CERN-PH-EP-2015-032
Title Measurement of charged-particle spectra in Pb+Pb collisions at sNN=2.76TeV with the ATLAS detector at the LHC
Related titleMeasurement of charged-particle spectra in Pb+Pb collisions at sNN=2.76 TeV with the ATLAS detector at the LHC
Author(s) ATLAS Collaboration  Show all 2829 authors
Publication 2015-09-09
Imprint 16 Apr 2015
Number of pages 36
Note 36 pages plus author list + cover pages (57 pages total), 18 figures, 4 tables, published in JHEP09(2015)050. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-03/
In: JHEP 09 (2015) 050
DOI 10.1007/JHEP09(2015)050
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords relativistic heavy ion physics ; particle and resonance production ; experimental results
Abstract Charged-particle spectra obtained in 0.15nb1 of Pb+Pb interactions at sNN=2.76TeV and 4.2pb1 of pp interactions at s=2.76TeV with the ATLAS detector at the LHC are presented in a wide transverse momentum (0.5<pT<150GeV) and pseudorapidity (|η|<2) range. For Pb+Pb collisions, the spectra are presented as a function of collision centrality, which is determined by the response of the forward calorimeter located on both sides of the interaction point. The nuclear modification factors RAA and RCP are presented in detail as function of centrality, pT and η. They show a distinct pT-dependence with a pronounced minimum at about 7GeV. Above 60GeV, RAA is consistent with a plateau at a centrality-dependent value, within the uncertainties. The value is 0.55±0.01(stat.)±0.04(syst.) in the most central collisions. The RAA distribution is consistent with flat |η| dependence over the whole transverse momentum range in all centrality classes.
Copyright/License preprint: © 2015-2025 CERN (License: CC-BY-3.0)
publication: © 2015-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³

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Email contact: a_ciocio@lbl.gov


 Záznam vytvorený 2015-04-16, zmenený 2024-04-19


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