Charge Fluctuations in pp and AA Collisions at RHIC and LHC Energies


Various measures of event-by-event net charge and charge ratio fluctuations in pp and AA collisions at RHIC and LHC energies are studied using the different Monte Carlo generators: URQMD, HIJING and HIJING/ and the results are compared with the predictions for the independent emission, hadron gas and QGP phase. Values of the D-measures are observed to exhibit significant energy dependence for both pp and AA data. Furthermore, there is essentially no significant difference in the values of the D-measures predicted by the various Monte Carlo codes used in the present study. A slight centrality dependence of the D-measures in terms of net charge fluctuations is observed in the case of Au-Au data at 200A GeV/c. These findings, thus, suggest that a difference in the D-measures for pp and AA collisions either the re-scattering effect plays a predominant role or there might be some new physics present in these collisions.

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S. Ahmad, M. Zafar, M. Irfan and A. Ahmad, "Charge Fluctuations in pp and AA Collisions at RHIC and LHC Energies," World Journal of Nuclear Science and Technology, Vol. 2 No. 4, 2012, pp. 200-205. doi: 10.4236/wjnst.2012.24031.

Conflicts of Interest

The authors declare no conflicts of interest.


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