Forward-backward multiplicity fluctuations in heavy nuclei collisions in the wounded nucleon model

TL;DR

This paper uses the wounded nucleon model to explain the enhanced forward-backward multiplicity fluctuations observed in heavy nuclei collisions, showing it outperforms other models like HIJING, AMPT, and UrQMD.

Contribution

It demonstrates that the wounded nucleon model can effectively describe multiplicity fluctuations in heavy-ion collisions, emphasizing the role of asymmetric particle production and wounded nucleon number fluctuations.

Findings

Wounded nucleon model explains fluctuation enhancement.

Model outperforms HIJING, AMPT, UrQMD.

Asymmetric pseudorapidity density is key.

Abstract

We use the wounded nucleon model to study the forward-backward multiplicity fluctuations measured by the PHOBOS Collaboration in Au+Au collisions at sqrt(s_NN)=200 GeV. The enhancement of forward-backward fluctuations in Au+Au collisions with respect to the elementary p+p interactions is in this model explained by the asymmetric shape of the pseudorapidity density of produced particles from a single wounded nucleon and the fluctuations of the number of wounded nucleons in the colliding nuclei. The wounded nucleon model describes these experimental data better than the HIJING, AMPT or UrQMD models do.