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Search for the onset of baryon anomaly at RHIC-PHENIX

  • Regular Article – Experimental Physics
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Abstract

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 \(\sqrt{s_{\mathrm{NN}}}\). 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 \(\sqrt{s_{\mathrm{NN}}}=22.5\) 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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Authors and Affiliations

  1. Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan

    T. Chujo

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  1. T. Chujo
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Correspondence to T. Chujo.

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25.75.Dw

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Chujo, T. Search for the onset of baryon anomaly at RHIC-PHENIX. Eur. Phys. J. C 49, 23–28 (2007). https://doi.org/10.1140/epjc/s10052-006-0088-3

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  • DOI: https://doi.org/10.1140/epjc/s10052-006-0088-3

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