München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.36: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

Production of Eta Mesons in p+p, d+Au and Au+Au Collisions at 200 GeV at RHIC — •Baldo Sahlmueller — Institut fuer Kernphysik, Muenster, Germany

The PHENIX experiment at RHIC has measured a suppression of various hadrons in central Au+Au collisions at high p_T compared to scaled yields measured in p+p collisions. By contrast, no such suppression has been observed in peripheral Au+Au collisions and in d+Au collisions. The measurement of the eta meson gives further hints on possible particle dependencies of the observed suppression.
The production ratio of the eta meson and the neutral pion is also of interest. It is useful as an input for other measurements, e.g. of direct photons. It also provides useful information for understanding the production processes in the different collision systems.
In this poster we will present the final results from measurements of the inclusive eta yields for different reaction systems (Au+Au, d+Au, p+p) and for different centrality classes (d+Au, Au+Au). The different suppression patterns of the eta meson will be shown and compared to other particles. We will also present the production ratio of the eta meson and the neutral pion.
This work is supported by BMBF.