An experiment study on the quark matter properties and QCD phase structure at RHIC

In this paper, we review the recent results from relativistic heavy-ion collision experiments at Relativistic Heavy Ion Collider-Solenoidal Tracker at RHIC (RHIC-STAR), primarily focusing on collective flow; high moments of conserved quantities; and the production of light nuclei, heavy flavor and strange hadrons. The experiment discovered thermalized quark matter in high-energy heavy-ion collisions. With measurements from RHIC-STAR Beam Energy Scan Phase I, several observables indicate the Quantum chromodynamics (QCD) critical region exists below collision energy root s(NN) = 39 GeV. Finally, we discuss ongoing global facilities for beam energy scan experiments and the research direction of QCD phase structure.