Moments of event observable distributions and many-body correlations

We investigate event-by-event fluctuations for ensembles with non-fixed multiplicity. Moments of event observable distributions, like total energy distribution, total transverse momentum distribution, etc, are shown to b
We investigate event-by-event fluctuations for ensembles with non-fixed multiplicity. Moments of event observable distributions, like total energy distribution, total transverse momentum distribution, etc, are shown to be related to the multi-body correlations present in the system. For classical systems, these moments reduce in the absence of any correlations to the mo- ments of particle inclusive momentum distribution. As a consequence, a zero value for the recently introduced Phi-variable is shown to indicate the van- ishing of two-body correlations from one part, and of correlations between multiplicity and momentum distributions from the other part. It is often misunderstood as a measure of the degree of equilibration in the system.
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Metadaten
Author:Mohamed Belkacem, Zoheir Aouissat, Marcus Bleicher, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-22631
Document Type:Preprint
Language:English
Date of Publication (online):2005/12/01
Year of first Publication:1999
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/12/01
Tag:Ereignisschwankungen ; Vielkörperkorrelationen
Event-by-event fluctuations ; many-body correlations
Source:http://www.arxiv.org/abs/nucl-th/9903017 , Version 2
HeBIS PPN:185402925
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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