Abstract
The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at 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.
- 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