Bulk Properties in Au+Au Collisions at $\sqrt{s_{NN}}$ = 9.2 GeV in STAR Experiment at RHIC

TL;DR

This paper reports on the first results from Au+Au collisions at 9.2 GeV at RHIC, measuring particle ratios, flow parameters, and HBT correlations to explore the QCD phase diagram.

Contribution

It provides new experimental data at 9.2 GeV, demonstrating STAR detector capabilities for QCD phase diagram exploration.

Findings

Particle ratios consistent with lower energy data

Azimuthal anisotropy parameters measured at 9.2 GeV

HBT measurements at this energy

Abstract

One of the primary goals of high-energy heavy-ion collisions is to establish the QCD phase diagram and search for possible phase boundaries. The planned RHIC energy scan program will explore this exciting physics topic using heavy-ion collisions at various center of mass energies. The first test run with Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV took place in early 2008. We present the results on identified particle ratios, azimuthal anisotropy parameters (v1 and v2) and HBT at midrapidity using data from this run. These results are compared to data for both lower and higher center of mass energies at the AGS, SPS and RHIC. These new data demonstrate the capabilities of the STAR detector for exploring the QCD phase diagram.