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KS0, Λ and ≡ production at intermediate to high pT from Au+Au collisions at $\sqrt {s_{NN} } $ = 39, 11.5 and 7.7 GeV

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Zhu X.

Open Physics

2012

vol. 10

issue 6

1345-1348

We report on the p T dependence of nuclear modification factors (R CP) for KS0, Λ, ≡ and the $\bar NK_S^0 $ ratios at mid-rapidity from Au+Au collisions at $\sqrt {s_{NN} } $ = 39, 11.5 and 7.7 GeV. At $\sqrt {s_{NN} } $ = 39 GeV, the R CP data show a baryon/meson separation at intermediate p T and a suppression for KS0 for p T up to 4.5 GeV/c; the $\bar \Lambda K_S^0 $ shows baryon enhancement in the most central collisions. However, at $\sqrt {s_{NN} } $ = 11.5 and 7.7 GeV, R CP shows less baryon/meson separation and $\bar NK_S^0 $ shows almost no baryon enhancement. These observations indicate that the matter created in Au+Au collisions at $\sqrt {s_{NN} } $ = 11.5 or 7.7 GeV might be distinct from that created at $\sqrt {s_{NN} } $ = 39 GeV.

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1 Open Physics

1 2012

1 Zhu X.

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KS0, Λ and ≡ production at intermediate to high pT from Au+Au collisions at $\sqrt {s_{NN} } $ = 39, 11.5 and 7.7 GeV