dorsal/arxiv
View SchemaMultiplicity Fluctuations in Proton-Proton and Nucleus-Nucleus Collisions
| Authors | V. P. Konchakovski, M. I. Gorenstein, E. L. Bratkovskaya |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0703052 |
| URL | https://arxiv.org/abs/nucl-th/0703052 |
| DOI | 10.1016/j.physletb.2007.06.032 |
| Journal | Phys.Lett.B651:114-118,2007 |
Abstract
We study the scaled variances of multiplicity fluctuations in nucleus-nucleus collisions at SPS and RHIC energies within the HSD transport model. The HSD results are compared with proton-proton data and with predictions of the hadron-resonance gas statistical model. We find that the HSD scaled variances $\omega_i$ for negatively, positively, and all charged hadrons in central nucleus-nucleus collisions remain close to the $\omega_i$ values in proton-proton collisions and increase with collision energy as the corresponding multiplicities per participating nucleon. The statistical model predicts very different behavior of $\omega_i$. However, a comparison with preliminary NA49 data for the most central Pb+Pb collisions at SPS energies does not permit to distinguish the HSD and statistical model results. New measurements of the multiplicity fluctuations in nucleus-nucleus collisions in a wide energy region with large acceptance are needed to allow for a proper determination of the underlying dynamics.
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"abstract": "We study the scaled variances of multiplicity fluctuations in nucleus-nucleus\ncollisions at SPS and RHIC energies within the HSD transport model. The HSD\nresults are compared with proton-proton data and with predictions of the\nhadron-resonance gas statistical model. We find that the HSD scaled variances\n$\\omega_i$ for negatively, positively, and all charged hadrons in central\nnucleus-nucleus collisions remain close to the $\\omega_i$ values in\nproton-proton collisions and increase with collision energy as the\ncorresponding multiplicities per participating nucleon. The statistical model\npredicts very different behavior of $\\omega_i$. However, a comparison with\npreliminary NA49 data for the most central Pb+Pb collisions at SPS energies\ndoes not permit to distinguish the HSD and statistical model results. New\nmeasurements of the multiplicity fluctuations in nucleus-nucleus collisions in\na wide energy region with large acceptance are needed to allow for a proper\ndetermination of the underlying dynamics.",
"arxiv_id": "nucl-th/0703052",
"authors": [
"V. P. Konchakovski",
"M. I. Gorenstein",
"E. L. Bratkovskaya"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.physletb.2007.06.032",
"journal_ref": "Phys.Lett.B651:114-118,2007",
"title": "Multiplicity Fluctuations in Proton-Proton and Nucleus-Nucleus Collisions",
"url": "https://arxiv.org/abs/nucl-th/0703052"
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