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Advances in High Energy Physics
Volume 2013, Article ID 352180, 27 pages
Review Article

Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

High Energy Physics Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India

Received 18 June 2013; Accepted 10 October 2013

Academic Editor: Sakina Fakhraddin

Copyright © 2013 Ashwini Kumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present paper reviews facts and problems concerning charge hadron production in high energy collisions. Main emphasis is laid on the qualitative and quantitative description of general characteristics and properties observed for charged hadrons produced in such high energy collisions. Various features of available experimental data, for example, the variations of charged hadron multiplicity and pseudorapidity density with the mass number of colliding nuclei, center-of-mass energies, and the collision centrality obtained from heavy-ion collider experiments, are interpreted in the context of various theoretical concepts and their implications. Finally, several important scaling features observed in the measurements mainly at RHIC and LHC experiments are highlighted in the view of these models to draw some insight regarding the particle production mechanism in heavy-ion collisions.