Measurement of the azimuthal anisotropy of charged-particle production in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV with the ATLAS detector

Abstract

This paper describes the measurements of flow harmonics $v_2$-$v_6$ in 3 $\mu {\mathrm{b}}^{-1}$ of Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV performed using the ATLAS detector at the LHC. Measurements of the centrality, multiplicity and $p_{\mathrm{T}}$ dependence of the $v_n$ obtained using two-particle correlations and the scalar product technique are presented. The measurements are also performed using a template-fit procedure, which was developed to remove non-flow correlations in small collision systems. This non-flow removal is shown to have a significant influence on the measured $v_n$ at high $p_{\mathrm{T}}$, especially in peripheral events. Comparisons of the measured $v_n$ with measurements in Pb+Pb collisions and $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV are also presented. The $v_n$ values in Xe+Xe collisions are observed to be larger than those in Pb+Pb collisions for $n=2$, 3 and 4 in the most central events. However, with decreasing centrality or increasing harmonic order $n$, the $v_n$ values in Xe+Xe collisions become smaller than those in Pb+Pb collisions. The $v_n$ in Xe+Xe and Pb+Pb collisions are also compared as a function of the mean number of participating nucleons, $⟨N_{\text{part}}⟩$, and the measured charged-particle multiplicity in the detector. The $v_3$ values in Xe+Xe and Pb+Pb collisions are observed to be similar at the same $⟨N_{\text{part}}⟩$ or multiplicity, but the other harmonics are significantly different. Comparisons of the $v_n$ measurements with theoretical calculations are also made.

53 pages in total, author list starting page 37, 21 figures, 1 table, submitted to Phys. Rev. C. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2019-03/

References in corpus (7)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Glauber Modeling in High Energy Nuclear Collisions
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Relativistic viscous hydrodynamics, conformal invariance, and holography
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Measurements of the Nuclear Modification Factor for Jets in Pb+Pb Collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with the ATLAS Detector
• Measurement of flow harmonics with multi-particle cumulants in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector

Cited by in corpus (41)

• Evidence of quadrupole and octupole deformations in ${}^{96}$Zr+${}^{96}$Zr and ${}^{96}$Ru+${}^{96}$Ru collisions at ultra-relativistic energies
• Shape of atomic nuclei in heavy ion collisions
• Imaging Shapes of Atomic Nuclei in High-Energy Nuclear Collisions
• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• Probing triaxial deformation of atomic nuclei in high-energy heavy ion collisions
• Evidence of the triaxial structure of ${}^{129}$Xe at the Large Hadron Collider
• The Present and Future of QCD
• Evidence of Hexadecapole Deformation in Uranium-238 at the Relativistic Heavy Ion Collider
• Constraining the quadrupole deformation of atomic nuclei with relativistic nuclear collisions
• ${}^{16}{\mathrm{O}}^{16}\mathrm{O}$ at RHIC and the LHC comparing $\alpha$ clustering vs substructure
• Probing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions
• Correlations between flow and transverse momentum in Xe+Xe and Pb+Pb collisions at the LHC with the ATLAS detector: a probe of the heavy-ion initial state and nuclear deformation
• Accessing the shape of atomic nuclei with relativistic collisions of isobars
• Scaling approach to nuclear structure in high-energy heavy-ion collisions
• Longitudinal flow decorrelations in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV with the ATLAS detector
• Ratios of collective flow observables in high-energy isobar collisions are insensitive to final state interactions
• The shape of gold
• Anatomy of octupole correlations in ${}^{96}$Zr with a symmetry-restored multidimensionally-constrained covariant density functional theory
• A method to test the coupling strength of the linear and nonlinear contributions to higher-order flow harmonics via Event Shape Engineering
• Structure of ${}^{128,129,130}$Xe through multi-reference energy density functional calculations
• Effects of clustered nuclear geometry on the anisotropic flow in O-O collisions at the LHC within a multiphase transport model framework
• Disentangling sources of momentum fluctuations in Xe+Xe and Pb+Pb collisions with the ATLAS detector
• Measures of azimuthal anisotropy in high-energy collisions
• Probing initial geometrical anisotropy and final azimuthal anisotropy in heavy-ion collisions at Large Hadron Collider energies through event-shape engineering
• Anisotropic flow of identified hadrons in Xe-Xe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.44TeV
• Transverse momentum balance of dijets in Xe+Xe collisions at the LHC
• Measurement of muon pairs produced via $\gamma \gamma$ scattering in non-ultraperipheral Pb+Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=5.02$ TeV with the ATLAS detector
• Imaging nuclear shape through anisotropic and radial flow in high-energy heavy-ion collisions
• Impact of quadrupole deformation on intermediate-energy heavy-ion collisions
• Updated analysis of jet quenching at RHIC and LHC within the light cone path integral approach
• Investigations on mixed harmonic cumulants in heavy-ion collisions at the LHC
• Measurement of the Sensitivity of Two-Particle Correlations in $pp$ Collisions to the Presence of Hard Scatterings
• Role of clustered nuclear geometry in particle production through p-C and p-O collisions at the Large Hadron Collider
• Benchmarking nuclear matrix elements of $0\nu \beta \beta$ decay with high-energy nuclear collisions
• Exploring nuclear structure with multiparticle azimuthal correlations at the LHC
• Measurement of forward charged hadron flow harmonics in peripheral PbPb collisions at $\sqrt{s_{NN}}=5.02$ TeV with the LHCb detector
• Projecting the likely importance of weak-interaction-driven bulk viscosity in neutron star mergers
• Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at $\sqrt{s_{{}_{\text{NN}}}}=5.02$ TeV with the ATLAS detector
• Higher-order anisotropic flow correlations in Xe-Xe collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.44TeV$
• Topical issue on the intersection of low-energy nuclear structure and high-energy nuclear collisions
• Impact of the pre-equilibrium phase for the determination of nuclear geometry in high-energy isobar collisions