Results from the STAR Beam Energy Scan Program

Abstract

The main aim of the beam energy scan (BES) program at the Relativistic Heavy-Ion Collider (RHIC) is to explore the quantum chromodynamics (QCD) phase diagram. The specific physics goal is to search for the phase boundary and the QCD critical point. We present results from Au+Au collisions at various energies collected in the BES program by the Solenoidal Tracker At RHIC (STAR) experiment. First results on transverse momentum ($p_T$) spectra, $dN/dy$, and average transverse mass ($<m_T>$) for identified hadrons produced at mid-rapidity for $\sqrt{s_{NN}}$ = 7.7 GeV are presented. Centrality dependence of $dN/dy$ and $<p_T>$ are also discussed and compared to corresponding data from other energies. In addition, first results on charged hadron directed ($v_1$) and elliptic flow ($v_2$) for $\sqrt{s_{NN}}=$ 7.7, 11.5, and 39 GeV are presented. New results on event-by-event fluctuations (particle ratio, net-proton and net-charge higher moments) are presented for $\sqrt{s_{NN}}=$ 39 GeV.

8 pages, 6 figures, to appear as proceedings of ICPAQGP-2010 conference

References in corpus (9)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Elliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV
• Probing freeze-out conditions in heavy ion collisions with moments of charge fluctuations
• Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
• Canonical partition function and finite density phase transition in lattice QCD
• System-size independence of directed flow at the Relativistic Heavy-Ion Collider
• K/pi Fluctuations at Relativistic Energies
• Measuring Dynamical K/$\pi$ and p/$\pi$ Fluctuations in Au+Au Collisions from the STAR Experiment

Cited by in corpus (11)

• QCD critical region and higher moments for three flavor models
• Collision Energy Dependence of Viscous Hydrodynamic Flow in Relativistic Heavy-Ion Collisions
• The chiral phase transition with a chiral chemical potential in the framework of Dyson-Schwinger equations
• STAR Results from the RHIC Beam Energy Scan-I
• Systematics of Kinetic Freeze-out Properties in High Energy Collisions from STAR
• Review of Recent Results from the RHIC Beam Energy Scan
• Progress in vacuum susceptibilities and their applications to the chiral phase transition of QCD
• Constraining the Particle Production Mechanism in Au+Au Collisions at $\sqrt{s_{NN}}=$ 7.7, 27, and 200 GeV Using A Multi Phase Transport Model
• System size dependence of transverse momentum correlations at $\sqrt{s_{NN}}=$ 62.4 and 200 GeV at the BNL Relativistic Heavy Ion Collider
• Viscous Flow in Heavy-Ion Collisions from RHIC to LHC
• Evolution of elliptic and triangular flow as a function of beam energy in a hybrid model