Abstract
The ρ0 production at high pT (5.0 ⩽ pT ⩽ 10.0 GeV/c) measured in minimum bias p + p, Au+Au and central Au+Au collisions in the STAR detector is presented. The ρ0/π ratio measured in p + p is compared to PYTHIA calculations as a test of perturbative quantum chromodynamics (pQCD) that describes reasonably well particle production from hard processes. The ρ0 nuclear modification factor is also presented. In p + p collisions, charged pions and (anti-)protons are measured in the range 5.0 ⩽ pT ⩽ 15.0 GeV/c, and the anti-particle to particle ratio and the baryon-to-meson ratios of these hadrons are discussed.
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