An Overview of STAR Experimental Results

Abstract

With large acceptance and excellent particle identification, STAR is one of the best mid-rapidity collider experiments for studying high-energy nuclear collisions. The STAR experiment provides full information on initial conditions, properties of the hot and dense medium as well as the properties at freeze-out. In Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV, STAR's focus is on the nature of the sQGP produced at RHIC. In order to explore the properties of the QCD phase diagram, since 2010, the experiment has collected sizable data sets of Au+Au collisions at the lower collision energy region where the net-baryon density is large. At the 2014 Quark Matter Conference, the STAR experiment made 16 presentations that cover physics topics including {\it collective dynamics}, {\it electromagnetic probes}, {\it heavy flavor}, {\it initial state physics}, {\it jets}, {\it QCD phase diagram}, {\it thermodynamics and hadron chemistry}, and {\it future experimental facilities, upgrades, and instrumentation} [1-16]. In this overview we will highlight a few results from the STAR experiment, especially those from the recent measurements of the RHIC beam energy scan program. At the end, instead of a summary, we will discuss STAR's near future physics programs at RHIC.

8 pages, 8 figures

References in corpus (12)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• Scale for the Phase Diagram of Quantum Chromodynamics
• Testing the chiral magnetic and chiral vortical effects in heavy ion collisions
• ${\mathbf{D}}_{\mathbf{s}}$-Meson as Quantitative Probe of Diffusion and Hadronization in Nuclear Collisions
• Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC
• J/psi Production in Quark-Gluon Plasma
• Testing the Chiral Magnetic Effect with Central U+U collisions
• Measurement of longitudinal spin asymmetries for weak boson production in polarized proton-proton collisions at RHIC
• Predictions of elliptic flow and nuclear modification factor from 200 GeV U + U collisions at RHIC
• Baseline for the cumulants of net-proton distributions at STAR
• Initial state geometry and fluctuations in Au+Au, Cu+Au and U+U collisions at RHIC

Cited by in corpus (9)

• Initial, effective, and kinetic freeze-out temperatures from transverse momentum spectra in high energy proton(deuteron)-nucleus and nucleus-nucleus collisions
• $K^{\ast }$ vector meson resonances dynamics in heavy-ion collisions
• Effect of an electromagnetic field on the spectra and elliptic flow of particles
• An energy independent scaling of transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton collisions
• Chemical potentials of light hadrons and quarks from yield ratios of negative to positive particles in high energy $pp$ collisions
• Beam energy dependence of cumulants of the net-baryon, net-charge and deuteron multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}}=3.0-5.0$ GeV
• Kinetic freeze-out temperature and transverse flow velocity in Au-Au collisions at RHIC-BES energies
• Effects of Initial Density Fluctuations on Cumulants in Au + Au Collisions at $\sqrt{s_{NN}}$ = 7.7 GeV
• Comment on "Evaluation of kinetic freeze-out properties in different relativistic heavy-ion collision systems at \sqrtsNN = 200 GeV'' (Eur. Phys. J. Plus (2025) 140:179) https://doi.org/10.1140/epjp/s13360-025-06119-0