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 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.
| Author: | Mohamed Belkacem, Zoheir Aouissat, Marcus Bleicher, Horst Stöcker, Walter Greiner |
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| URN: | urn:nbn:de:hebis:30-22631 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 01.12.2005 |
| Year of first Publication: | 1999 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| 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): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
