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 a
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
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Metadaten
Author:Volodymyr P. Konchakovski, Stephane Häussler, Mark I. Gorenstein, Elena L. Bratkovskaya, Marcus Bleicher, Horst Stöcker
URN:urn:nbn:de:hebis:30-22725
Document Type:Preprint
Language:English
Date of Publication (online):2005/12/05
Year of first Publication:2005
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/12/05
Tag:Hadron; Modell ; Partikelzahlschwankung ; Transport
mixing of hadron sources; particle number fluctuations ; transport models
HeBIS PPN:190591285
Institutes:Physik
Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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