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.
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 |