Regular Article – Experimental Physics
Search for the onset of baryon anomaly at RHIC-PHENIX
Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan
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Published online: 16 November 2006
The baryon production mechanism at the intermediate pT (2–5 GeV/c) at RHIC is still not well understood. The beam energy scan data in Cu+Cu and Au+Au systems at RHIC may provide us a further insight on the origin of the baryon anomaly and its evolution as a function of . In 2005 RHIC physics program, the PHENIX experiment accumulated the first intensive low beam energy data in Cu+Cu collisions. We present the preliminary results of identified charged hadron spectra in Cu+Cu at and 62.4 GeV using the PHENIX detector. The centrality and beam energy dependences of (anti)proton to pion ratios and the nuclear modification factors for charged pions and (anti)protons are presented.
© Springer-Verlag Berlin Heidelberg, 2007