Strangeness and bulk freeze-out properties at RHIC

Abstract

Identified charged kaon, pion, and proton spectra and ratios from sqrt(s_NN) = 200 and 62.4 GeV Cu+Cu collisions are studied with a hydro-motivated blast-wave and a statistical model framework in order to explore the strangeness production at RHIC and characterize the bulk freeze-out properties of the created system. The spectra are measured at mid-rapidity |y|<0.1 over the transverse momentum range of 0.25 < p_T < 1.2 GeV/c with particle identification derived from the ionization energy loss in the STAR Time Projection Chamber. The multi-dimensional systematic study of pi(+/-), K(+/-), p and pbar production in Cu+Cu, Au+Au, d+Au and p+p collisions is used to discuss the energy, system size and inferred energy density dependence of freeze-out parameters and strangeness production. The new data from Cu+Cu collisions bridge the gap between the smaller d+Au and larger Au+Au systems, allowing a detailed study of the onset of strangeness equilibration at RHIC.

6 pages, 5 figures, proceedings to Strangeness in Quark Matter 2007

References in corpus (9)

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Cited by in corpus (6)

• Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
• Examining the model dependence of the determination of kinetic freeze-out temperature and transverse flow velocity in small collision system
• Identified high-$p_T$ spectra in Cu+Cu collisions at $\sqrt{s_{NN}}$=200 GeV
• Resonance production in heavy-ion collisions at STAR
• Overview of Strangeness Production at the STAR Experiment
• Strange Particle Production at RHIC