Eur. Phys. J. A (2010) 45: 51-55
https://doi.org/10.1140/epja/i2010-10970-6

Regular Article - Theoretical Physics

Superposition models and the multiplicity fluctuations in heavy-ion collisions

M. Smoluchowski Institute of Physics, Jagellonian University, ul. Reymonta 4, 30-059, Kraków, Poland

^* e-mail: romuald.wit@uj.edu.pl

Received: 18 February 2010
Revised: 23 March 2010
Accepted: 7 April 2010
Published online: 20 May 2010

Abstract

A class of simple superposition models based on the Glauber picture of multiple collisions is compared with the data on the centrality dependence of the multiplicity distributions in a central rapidity bin. We show how the results depend on the specific assumptions concerning the distributions in the number of participants and their relations to the distributions of the number of produced hadrons in various phase space bins. None of the versions of the model describes satisfactorily the centrality dependence of the scaled dispersion.