Particle number fluctuations in high energy nucleus-nucleus collisions from microscopic transport approaches
Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are studied within the HSD and UrQMD transport models. The scaled variances of negative, positive, and all charged hadrons in Pb+Pb at 158 AGeV are analyzed in comparison to the data from the NA49 Collaboration. We find a dominant role of the fluctuations in the nucleon participant number for the final hadron multiplicity fluctuations. This fact can be used to check di erent scenarios of nucleus-nucleus collisions by measuring the final multiplicity fluctuations as a function of collision centrality. The analysis reveals surprising e ects in the recent NA49 data which indicate a rather strong mixing of the projectile and target hadron production sources even in peripheral collisions. PACS numbers: 25.75.-q,25.75.Gz,24.60.-k
| Author: | Volodymyr P. Konchakovski, Stephane Häussler, Mark I. Gorenstein, Elena L. Bratkovskaya, Marcus Bleicher, Horst Stöcker |
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| URN: | urn:nbn:de:hebis:30-22725 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 05.12.2005 |
| Year of first Publication: | 2005 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Tag: | Hadron; Modell ; Partikelzahlschwankung ; Transport mixing of hadron sources; particle number fluctuations ; transport models |
| HeBIS PPN: | 190591285 |
| Institutes: | Physik |
| Frankfurt Institute for Advanced Studies | |
| Dewey Decimal Classification: | 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
