Study of the bulk properties of the system formed in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.5 GeV using the STAR detector at RHIC

Abstract

We present the first measurements of the transverse momentum spectra and azimuthal anisotropy of the identified hadrons (${\pi }^{+}$, ${\pi }^{-}$, $K^{+}$, $K^{-}$, $p(\bar{p})$, $K_s^0$, $\Lambda (\bar{\Lambda })$ and $\varphi$) at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.5 GeV for various collision centralities. These measurements are compared to corresponding results from other BES energies. The bulk properties of the system, like the chemical and kinetic freeze-out conditions and the collectivity extracted from the measured yields of the produced particles are presented. The difference between baryon and anti-baryon elliptic flow for minimum bias collisions previously reported by STAR is also observed in the new data taken at $\sqrt{s_{NN}}$ = 14.5 GeV. Furthermore, the new data at 14.5 GeV are consistent with the trend established by the results at lower and higher beam energies. The energy and centrality dependence of the baryon chemical potential (${\mu }_B$), radial flow velocity ($⟨\beta ⟩$), and chemical and kinetic freeze-out temperatures are discussed systematically.

4 pages, 12 figures, Proceedings of the Quark Matter 2015 conference

References in corpus (8)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Energy Dependence of Moments of Net-proton Multiplicity Distributions at RHIC
• Beam-Energy Dependence of Directed Flow of Protons, Antiprotons and Pions in Au+Au Collisions
• Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC
• Observation of an energy-dependent difference in elliptic flow between particles and anti-particles in relativistic heavy ion collisions
• Collective phenomena in non-central nuclear collisions
• Systematics of Kinetic Freeze-out Properties in High Energy Collisions from STAR
• Exploring the QCD landscape with high-energy nuclear collisions

Cited by in corpus (3)

• Excitation Functions of Tsallis-like Parameters in High-Energy Nucleus-Nucleus Collisions
• Analyzing transverse momentum spectra by a new method in high-energy collisions
• Kinetic freeze-out temperature and transverse flow velocity in Au-Au collisions at RHIC-BES energies