Beam-energy dependence of correlations between mean transverse momentum and anisotropic flow of charged particles in Au+Au collisions at RHIC

Abstract

The correlation between the mean transverse momentum, $[p_{\mathrm{T}}]$, and the squared anisotropic flow, $v_n^2$, on an event-by-event basis has been suggested to be influenced by the initial conditions in heavy-ion collisions. We present measurements of the variances and covariance of $[p_{\mathrm{T}}]$ and $v_n^2$, along with their dimensionless ratio, for Au+Au collisions at various beam energies: $\sqrt{{\text{s}}_{NN}}$ $=$ 14.6, 19.6, 27, 54.4, and 200~GeV. Our measurements reveal a distinct energy-dependent behavior in the variances and covariances. In addition, the dimensionless ratio displays a similar behavior across different beam energies. We compare our measurements with hydrodynamic models and similar measurements from Pb+Pb collisions at the Large Hadron Collider (LHC). These findings provide valuable insights into the beam energy dependence of the specific shear viscosity ($\eta /s$) and initial-state effects, allowing for differentiating between different initial-state models.

arXiv comment14 pages, 4 figures

References in corpus (60)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Flow Study in Relativistic Nuclear Collisions by Fourier Expansion of Azimuthal Particle Distributions
• Radial and elliptic flow at RHIC: further predictions
• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at 2.76 TeV
• 200 A GeV Au+Au collisions serve a nearly perfect quark-gluon liquid
• Alternative ansatz to wounded nucleon and binary collision scaling in high-energy nuclear collisions
• Why does the Quark-Gluon Plasma at RHIC behave as a nearly ideal fluid ?
• First Results from Pb+Pb collisions at the LHC
• Hadronic dissipative effects on elliptic flow in ultrarelativistic heavy-ion collisions
• Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt{s_{NN}} = 130 GeV
• Measurements of Higher-Order Flow Harmonics in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow
• Early thermalization at RHIC
• Measurement of the elliptic anisotropy of charged particles produced in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV
• Radial and elliptic flow in Pb+Pb collisions at the Large Hadron Collider from viscous hydrodynamic
• Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV
• Azimuthal anisotropy at RHIC: the first and fourth harmonics
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Bulk and shear viscosities of matter created in relativistic heavy-ion collisions
• Correlated event-by-event fluctuations of flow harmonics in Pb-Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=2.76$ TeV
• Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
• Disappearance of Elliptic Flow: A New Probe for the Nuclear Equation of State
• Azimuthal anisotropy of charged particles at high transverse momenta in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Third Harmonic Flow of Charged Particles in Au+Au Collisions at sqrtsNN = 200 GeV
• Event-by-event mean $p_{\mathrm{T}}$ fluctuations in pp and Pb-Pb collisions at the LHC
• Measurement of the azimuthal anisotropy of charged particles produced in $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV Pb+Pb collisions with the ATLAS detector
• Effect of the QCD equation of state and strange hadronic resonances on multiparticle correlations in heavy ion collisions
• Transverse momentum fluctuations and their correlation with elliptic flow in nuclear collision
• Transverse-momentum fluctuations in relativistic heavy-ion collisions from event-by-event viscous hydrodynamics
• Transverse momentum-flow correlations in relativistic heavy-ion collisions
• Multi-particle and charge-dependent azimuthal correlations in heavy-ion collisions at the Relativistic Heavy-Ion Collider
• Constraining models of initial conditions with elliptic and triangular flow data
• Measurement of flow harmonics correlations with mean transverse momentum in lead-lead and proton-lead collisions at $\sqrt{s_{NN}}=5.02$ TeV with the ATLAS detector
• Constraining the quadrupole deformation of atomic nuclei with relativistic nuclear collisions
• Azimuthal harmonics in small and large collision systems at RHIC top energies
• Observable signatures of initial state momentum anisotropies in nuclear collisions
• Importance of non-flow in mixed-harmonic multi-particle correlations in small collision systems
• Correlation coefficient between harmonic and transverse flow in heavy-ion collisions
• Disentangling flow and nonflow correlations via Bayesian unfolding of the event-by-event distributions of harmonic coefficients in ultrarelativistic heavy-ion collisions
• Impact of nuclear deformation on collective flow observables in relativistic U+U collisions
• Collision system and beam energy dependence of anisotropic flow fluctuations
• A method to test the coupling strength of the linear and nonlinear contributions to higher-order flow harmonics via Event Shape Engineering
• Measurement of two-particle correlations with respect to second- and third-order event planes in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Collision-System and Beam-Energy Dependence of Anisotropic Flow Fluctuations
• Exploring Origins for Correlations between Flow Harmonics and Transverse Momentum in Small Collision Systems (Unambiguous Ambiguity)
• Investigation of the elliptic flow fluctuations of the identified particles using the A Multi-Phase Transport model
• Higher order cumulants of transverse momentum and harmonic flow in relativistic heavy ion collisions
• Non-flow effects in three-particle mixed-harmonic azimuthal correlations in small collision systems
• Model investigations of the correlation between the mean transverse momentum and anisotropic flow in shape-engineered events
• Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions
• Characterizing the initial and final state effects of relativistic nuclear collisions
• Measuring differential flow angle fluctuations in relativistic nuclear collisions
• Model study of the energy dependence of the correlation between anisotropic flow and the mean transverse momentum in Au+Au collisions
• Beam Energy Dependence of the Linear and Mode-Coupled Flow Harmonics Using the A Multi-Phase Transport Model
• Measuring differential particle correlations in relativistic nuclear collisions