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Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at sNN=2.76TeV

K. Aamodt et al. (ALICE Collaboration)
Phys. Rev. Lett. 106, 032301 – Published 20 January 2011

Abstract

The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at sNN=2.76TeV is presented. The charged-particle density normalized per participating nucleon pair increases by about a factor of 2 from peripheral (70%–80%) to central (0%–5%) collisions. The centrality dependence is found to be similar to that observed at lower collision energies. The data are compared with models based on different mechanisms for particle production in nuclear collisions.

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  • Received 8 December 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.032301

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2011 American Physical Society

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Vol. 106, Iss. 3 — 21 January 2011

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