Azimuthal anisotropy measurement of (multi-)strange hadrons in Au+Au collisions at $\sqrt{s_{\text{NN}}}$ = 54.4 GeV

Abstract

Azimuthal anisotropy of produced particles is one of the most important observables used to access the collective properties of the expanding medium created in relativistic heavy-ion collisions. In this paper, we present second ($v_2$) and third ($v_3$) order azimuthal anisotropies of $K_S^0$, $\varphi$, $\Lambda$, $\Xi$ and $\Omega$ at mid-rapidity ($|y|<$1) in Au+Au collisions at $\sqrt{s_{\text{NN}}}$ = 54.4 GeV measured by the STAR detector. The $v_2$ and $v_3$ are measured as a function of transverse momentum and centrality. Their energy dependence is also studied. $v_3$ is found to be more sensitive to the change in the center-of-mass energy than $v_2$. Scaling by constituent quark number is found to hold for $v_2$ within 10%. This observation could be evidence for the development of partonic collectivity in 54.4 GeV Au+Au collisions. Differences in $v_2$ and $v_3$ between baryons and anti-baryons are presented, and ratios of $v_3$/$v_2^{3/2}$ are studied and motivated by hydrodynamical calculations. The ratio of $v_2$ of $\varphi$ mesons to that of anti-protons ($v_2(\varphi )/v_2(\bar{p})$) shows centrality dependence at low transverse momentum, presumably resulting from the larger effects from hadronic interactions on anti-proton $v_2$.

arXiv comment12 pages, 14 figures

References in corpus (53)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Radial and elliptic flow at RHIC: further predictions
• Elliptic flow of charged particles in Pb-Pb collisions at 2.76 TeV
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• Collision geometry fluctuations and triangular flow in heavy-ion collisions
• Elliptic Flow of Identified Hadrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Elliptic flow in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• Elliptic flow at large transverse momenta from quark coalescence
• Particle-type dependence of azimuthal anisotropy and nuclear modification of particle production in Au+Au collisions at s(NN)**(1/2) = 200-GeV
• System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow
• Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead-lead collisions at sqrt(s_NN) = 2.76 TeV with the ATLAS detector
• Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
• Azimuthal anisotropy at RHIC: the first and fourth harmonics
• Partonic flow and $\varphi$-meson production in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Evidence of early multi-strange hadron freeze-out in high energy nuclear collisions
• Evidence for in-medium modification of the $\varphi$ meson at normal nuclear density
• Multi-strange baryon elliptic flow in Au+Au collisions at sqrt(s_NN)= 200 GeV
• Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
• Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions
• Hadrons in strongly interacting matter
• Elliptic flow of identified hadrons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7--62.4 GeV
• Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV
• Elliptic Flow: A Brief Review
• Azimuthal anisotropy of K0s and Lambda prduction at mid-rapidity from Au+Au collisions at root s = 130 GeV
• Production of K${}^{\ast }$(892)${}^0$ and $\varphi$(1020) in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Experimental evidence for an attractive p-$\varphi$ interaction
• Observation of an energy-dependent difference in elliptic flow between particles and anti-particles in relativistic heavy ion collisions
• Elliptic and hexadecapole flow of charged hadrons in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Interplay between soft and hard hadronic components for identified hadrons in relativistic heavy ion collisions
• Constituent quark scaling violation due to baryon number transport
• Absorption of the $\omega$ and $\varphi$ Mesons in Nuclei
• Collision Energy Dependence of Viscous Hydrodynamic Flow in Relativistic Heavy-Ion Collisions
• Elliptic flow of $\varphi$ meson and strange quark collectivity at RHIC
• Measurement of the in-medium phi-meson width in proton-nucleus collisions
• Centrality and transverse momentum dependence of elliptic flow of multi-strange hadrons and $\varphi$ meson in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Title Quantum Optics and Heavy Ion Physics
• A Study of the Properties of the QCD Phase Diagram in High-Energy Nuclear Collisions
• Constraining models of initial conditions with elliptic and triangular flow data
• Azimuthally sensitive correlations in nucleus-nucleus collisions
• Elliptic flow splitting as a probe of the QCD phase structure at finite baryon chemical potential
• Saturation of azimuthal anisotropy in Au + Au collisions at sqrt(s_NN) = 62 - 200 GeV
• QCD sum rules for ρ, ω, ϕmeson-nucleon scattering lengths and the mass shifts in nuclear medium
• Probe the QCD phase diagram with ϕ-mesons in high energy nuclear collisions
• Strong absorption of hadrons with hidden and open strangeness in nuclear matter
• $\varphi$ meson transparency in nuclei from $\varphi N$ resonant interactions
• Event plane resolution correction for azimuthal anisotropy in wide centrality bins
• Azimuthal anisotropy measurements of strange and multistrange hadrons in U+U collisions at $\sqrt{s_{NN}}=193$ GeV at the BNL Relativistic Heavy Ion Collider
• Elliptic flow of ϕ-meson a sensitive probe for onset of de-confinement transition in high energy heavy-ion collisions
• A-dependence of phi-meson production in p+A collisions
• Dissipative corrections to particle spectra and anisotropic flow from a saddle-point approximation to kinetic freeze out
• Constraining models of initial state with $v_2$ and $v_3$ data from LHC and RHIC

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