Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at 5.02 TeV

The pseudorapidity density of charged particles, dNch=dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sNN 1⁄4 5.02 TeV. For the 5% most central collisions, we measure a value of 1943 54. The rise in dNch=dη as a function of sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch=dη as a function of the average number of participant nucleons, hNparti, calculated in a Glauber model, is compared with the previous measurement at sNN 1⁄4 2.76 TeV. A constant factor of about 1.2 describes the increase in dNch=dη from sNN 1⁄4 2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%–80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions.

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Eser Adı
(dc.title)
Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at 5.02 TeV
Özet
(dc.description.abstract)
The pseudorapidity density of charged particles, dNch=dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sNN 1⁄4 5.02 TeV. For the 5% most central collisions, we measure a value of 1943 54. The rise in dNch=dη as a function of sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch=dη as a function of the average number of participant nucleons, hNparti, calculated in a Glauber model, is compared with the previous measurement at sNN 1⁄4 2.76 TeV. A constant factor of about 1.2 describes the increase in dNch=dη from sNN 1⁄4 2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%–80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions.
Yayın Tarihi
(dc.date.issued)
2016
Kayıt Giriş Tarihi
(dc.date.accessioned)
2019-07-08T07:40:57Z
Açık Erişim tarihi
(dc.date.available)
2019-07-08T07:40:57Z
Yayın Dili
(dc.language.iso)
eng
Konu Başlıkları
(dc.subject)
Charged-Particle Multiplicity Density
Konu Başlıkları
(dc.subject)
LHC
Konu Başlıkları
(dc.subject)
ALICE
Yayın Türü
(dc.type)
Makale
Yazar/lar
(dc.contributor.author)
KARASU UYSAL, Ayben
Yazar/lar
(dc.contributor.author)
ALICE Collaboration
Tek Biçim Adres
(dc.identifier.uri)
https://hdl.handle.net/20.500.12498/586
DOI Numarası
(dc.identifier.doi)
10.1103/PhysRevLett.116.222302
Atıf Dizini
(dc.source.database)
Wos
Atıf Dizini
(dc.source.database)
Scopus
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