Search for the onset of baryon anomaly at RHIC-PHENIX

Details Search for the onset of baryon anomaly at RHIC-PHENIX Search for the onset of baryon anomaly at RHIC-PHENIX

2006-08-13

arxiv.org/abs/nucl-ex/0608020v2

Eur.Phys.J.C49:23-28,2007

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 9 figures, proceedings for Hot Quarks 2006 workshop, Villasimius, Sardinia, Italy, May 15 - 20, 2006. Proceedings of

Scientific paper

10.1140/epjc/s10052-006-0088-3

The baryon production mechanism at the intermediate $p_T$ (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 $\sqrt{s_{NN}}$. 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 $\sqrt{s_{NN}}$ = 22.5 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.

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