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Article
Report number arXiv:1509.07299 ; CERN-PH-EP-2015-257 ; ALICE-PUBLIC-2015-010 ; CERN-PH-EP-2015-257
Title Centrality evolution of the charged–particle pseudorapidity density over a broad pseudorapidity range in Pb–Pb collisions at sNN=2.76 TeV
Related titleSupplementary figures: “Centrality evolution of the charged–particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at sNN = 2.76 TeV"
Author(s) ALICE Collaboration  Εμφάνιση και των 982 συγγραφέων
Publication 2015
Imprint 14 Sep 2015
Number of pages 13
Note  figures at http://aliceinfo.cern.ch/ArtSubmission/node/1884
In: Phys. Lett. B 754 (2016) 373-385
DOI 10.1016/j.physletb.2015.12.082
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Free keywords relativistic heavy ion physics ; global features ; experimental results
Abstract The centrality dependence of the charged–particle pseudorapidity density measured with ALICE in Pb–Pb collisions at sNN=2.76 TeV over a broad pseudorapidity range is presented. This Letter extends to more peripheral collisions the previous results reported by ALICE. No strong evolution of the charged–particle pseudorapidity density distributions with centrality is observed, and when the results are normalized to the number of participating nucleons in the collisions, the centrality evolution is likewise small. This suggests that hard contributions to the charged–particle multiplicity are limited. The broad pseudorapidity range allows precise estimates of the total number of produced charged particles which we find to range from 162±22(syst.) to 17170±770(syst.) in 80–90% and 0–5% central collisions, respectively. The results are compared to models which describe dNch/dη at mid–rapidity in the most central Pb–Pb collisions and it is found that these models do not capture all features of the distributions. In the forward regions where the signal is dominated by secondary particles produced in the surrounding material, we use a data-driven correction to extract the primary charged–particle density.
Related document Supplementary figures: ALICE-PUBLIC-2015-010
Copyright/License preprint: © 2015-2025 CERN (License: CC-BY-4.0)
publication: © 2016-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³

Corresponding record in: Inspire
Email contact: enrico.scomparin@cern.ch


 Δημιουργία εγγραφής 2015-09-14, τελευταία τροποποίηση 2025-01-14


Article from SCOAP3:
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Elsevier Open Access article:
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Πλήρες κείμενο:
arXiv:1509.07299 - Κατέβασμα πλήρες κειμένουPDF
2015-010 - Κατέβασμα πλήρες κειμένουPDF
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εξωτερικός σύνδεσμος:
Κατέβασμα πλήρες κειμένουRivet analyses reference
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