Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 7: Heavy Ions I

HK 7.5: Talk

Monday, March 8, 2004, 17:15–17:30, F

Eta production in p+p, d+Au and Au+Au-collisions at RHIC — •Baldo Sahlmüller — Universität Münster, Institut für Kernphysik

In the PHENIX-experiment at RHIC the suppression of high pT neutral pions in central Au+Au collisions relative to scaled yields measured in p+p and d+Au collisions as well as those measured in peripheral Au+Au collisions was observed. Protons, by contrast, do not show such a suppression in the pT-region between 2 and 4 GeV/c. Therefore it is important to study how this effect depends on the particle species.

In this talk, we present measurements from the PHENIX experiment of the eta yields as a function of centrality (Au+Au) as well as of the different reaction-systems (d+Au, p+p) with emphasis on the suppression factor. Comparisons to the suppression of other particle species will be presented.

Supported by BMBF and GSI.