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
Verfasserangaben: | Volodymyr P. Konchakovski, Stéphane HausslerGND, Mark I. GorensteinORCiDGND, Elena L. BratkovskayaORCiDGND, Marcus BleicherORCiDGND, Horst StöckerORCiDGND |
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URN: | urn:nbn:de:hebis:30-22725 |
Dokumentart: | Preprint |
Sprache: | Englisch |
Datum der Veröffentlichung (online): | 05.12.2005 |
Jahr der Erstveröffentlichung: | 2005 |
Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Datum der Freischaltung: | 05.12.2005 |
Freies Schlagwort / Tag: | Hadron; Modell; Partikelzahlschwankung; Transport mixing of hadron sources; particle number fluctuations; transport models |
HeBIS-PPN: | 190591285 |
Institute: | Physik / Physik |
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) | |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Lizenz (Deutsch): | Deutsches Urheberrecht |