Charged particle fluctuations and microscopic models of nuclear collisions

Abstract

We study the event-by-event fluctuations of the charged particles and compare the results of different Monte-Carlo Generators (MCG): VNIb, HIJING, HIJING/B$\bar{B}$ and RQMD. We find that the $D$-measure can be used to distinguish between the different gluon populations that are present in the MCG models. On the other hand, the value of the $D$-measure shows high sensitivity to the rescattering effects in VNIb model, but lower sensitivity to the rescattering effects in RQMD model. We also find that the $D$-measures from AA are consistent with the $D$-measures from $pp$ for all generators except VNIb. Therefore, any deviation among the values of $D$-measure for different impact parameters and between $pp$ and $AA$ collisions may indicate that either the rescattering effects play a key role in the interactions or there is new physics in $AA$ collisions.

some type errors are corrected

References in corpus (6)

• Baryon Number Fluctuation and the Quark-Gluon Plasma
• Isospin Fluctuations in QCD and Relativistic Heavy-Ion Collisions
• Statistical Fluctuations as Probes of Dense Matter
• Charge Fluctuations at Disoriented Chiral Transition
• Charge fluctuations in a final state with QGP
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