Forward-backward correlations in nucleus-nucleus collisions: baseline contributions from geometrical fluctuations
| Autor: | Konchakovski, V. P., Hauer, M., Torrieri, G, Gorenstein, M. I., Bratkovskaya, E. L. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys.Rev.C79:034910,2009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.79.034910 |
| Popis: | We discuss the effects of initial collision geometry and centrality bin definition on correlation and fluctuation observables in nucleus-nucleus collisions. We focus on the forward-backward correlation coefficient recently measured by the STAR Collaboration in Au+Au collisions at RHIC. Our study is carried out within two models: the Glauber Monte Carlo code with a `toy' wounded nucleon model and the hadron-string dynamics (HSD) transport approach. We show that strong correlations can arise due to averaging over events in one centrality bin. We, furthermore, argue that a study of the dependence of correlations on the centrality bin definition as well as the bin size may distinguish between these `trivial' correlations and correlations arising from `new physics'. Comment: 12 pages, 6 figures |
| Databáze: | arXiv |
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