Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at root(NN)-N-S=5.02 TeV



Adam, J, Adamova, D, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Aiola, S
et al (show 982 more authors) (2016) Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at root(NN)-N-S=5.02 TeV. PHYSICAL REVIEW LETTERS, 116 (22). 222302-.

This is the latest version of this item.

[img] Text
Centrality dependence of the charged-particle multiplicity density at mid rapidity in Pb-Pb collsions at sqrt(sNN) = 5.02 TeV.pdf - Author Accepted Manuscript

Download (900kB)

Abstract

The pseudorapidity density of charged particles, dN_{ch}/dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02  TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dN_{ch}/dη as a function of sqrt[s_{NN}] is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dN_{ch}/dη as a function of the average number of participant nucleons, ⟨N_{part}⟩, calculated in a Glauber model, is compared with the previous measurement at sqrt[s_{NN}]=2.76  TeV. A constant factor of about 1.2 describes the increase in dN_{ch}/dη from sqrt[s_{NN}]=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.

Item Type: Article
Uncontrolled Keywords: ALICE Collaboration
Depositing User: Symplectic Admin
Date Deposited: 13 Jul 2016 11:24
Last Modified: 19 Jan 2023 07:33
DOI: 10.1103/PhysRevLett.116.222302
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002288

Available Versions of this Item