Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2009-06-03
Physics
Nuclear Physics
Nuclear Experiment
8 pages, 5 Figures. Presented at the 25th Winter Workshop on Nuclear Dynamics, USA
Scientific paper
Theoretical models suggest that the Quantum Chromo-Dynamics (QCD) phase diagram has a critical point demarcating the order of transition between the two phases: the hadron gas, in which the quarks are confined and the Quark-Gluon Plasma (QGP). The central goal of the experiments with relativistic heavy-ion collisions is to create and study such form of matter called the QGP and understand the QCD phase diagram. The STAR (Solenoidal Tracker At RHIC) detector is pertinent for the RHIC (Relativistic Heavy Ion Collider) energy scan program where we plan to explore this exciting physics possibility using heavy-ion collisions at various center of mass energies. A first test run with Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV took place in early 2008. We present the recent STAR results from this run of the identified particles (pion, kaon and proton) transverse momentum spectra and ratios. Also we shall present and discuss the results of the azimuthal anisotropy parameters ($v_{1}$, $v_{2}$) along with the pion interferometry measurements. These recent results from Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV are compared with other SPS and RHIC measurements.
Das Debasish
for the STAR Collaboration
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