Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source model

Abstract

We examine the evolution of quark-gluon plasma (QGP) droplets with viscous hydrodynamics and analyze the pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in a granular source model consisting of viscous QGP droplets. The shear viscosity of the QGP droplet speeds up and slows down the droplet evolution in the central and peripheral regions of the droplet, respectively. The effect of the bulk viscosity on the evolution is negligible. Although there are viscous effects on the droplet evolution, the pion momentum spectrum and elliptic flow change little for granular sources with and without viscosity. On the other hand, the influence of viscosity on HBT radius $R_{\mathrm{out}}$ is considerable. It makes $R_{\mathrm{out}}$ decrease in the granular source model. We determine the model parameters of granular sources using the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii together, and investigate the effects of viscosity on the model parameters. The results indicate that the granular source model may reproduce the experimental data of pion transverse-momentum spectrum, elliptic flow, and HBT radii in heavy-ion collisions of Au-Au at $\sqrt{s_{NN}}=200$ GeV and Pb-Pb at $\sqrt{s_{NN}}=2.76$ TeV in different centrality intervals. The viscosity of the droplet leads to an increase in the initial droplet radius and a decrease of the source shell parameter in the granular source model.

arXiv comment15 pages, 7 figures, the revised version is for publication in Chinese Physics C

References in corpus (81)

• 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
• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• Collective flow and viscosity in relativistic heavy-ion collisions
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• New Forms of QCD Matter Discovered 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
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• Identified Charged Particle Spectra and Yields in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Hydrodynamic Modeling of Heavy-Ion Collisions
• What RHIC Experiments and Theory tell us about Properties of Quark-Gluon Plasma ?
• Femtoscopy in Relativistic Heavy Ion Collisions: Two Decades of Progress
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• 3+1D hydrodynamic simulation of relativistic heavy-ion collisions
• New Developments in Relativistic Viscous Hydrodynamics
• Causal viscous hydrodynamics in 2+1 dimensions for relativistic heavy-ion collisions
• 200 A GeV Au+Au collisions serve a nearly perfect quark-gluon liquid
• Simulating elliptic flow with viscous hydrodynamics
• Identified particle distributions in pp and Au+Au collisions at sqrt{s_NN}=200 GeV
• Particle Interferometry for Relativistic Heavy-Ion Collisions
• Event-by-Event Simulation of the Three-Dimensional Hydrodynamic Evolution from Flux Tube Initial Conditions in Ultrarelativistic Heavy Ion Collisions
• Pion interferometry in Au+Au collisions at $\sqrt{{\mathrm{s}}_{{}_{\mathrm{NN}}}}$ = 200 GeV
• Relativistic Hydrodynamics for Heavy--Ion Collisions -- I. General Aspects and Expansion into Vacuum
• Dissipative Hydrodynamics and Heavy Ion Collisions
• Radial and elliptic flow in Pb+Pb collisions at the Large Hadron Collider from viscous hydrodynamic
• Bulk viscosity of gauge theory plasma at strong coupling
• The Time-Delay Signature of Quark-Gluon-Plasma Formation in Relativistic Nuclear Collisions
• Pion Interferometry of $\sqrt{s_{NN}}=130$ GeV Au+Au Collisions at RHIC
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Topology studies of hydrodynamics using two particle correlation analysis
• Results from the Relativistic Heavy Ion Collider
• Dissipative hydrodynamics for viscous relativistic fluids
• Estimation of the shear viscosity at finite net-baryon density from A+A collision data at $\sqrt{s_{\mathrm{NN}}}=7.7-200$ GeV
• Bose-Einstein Correlations of Charged Pion Pairs in Au+Au Collisions at sqrt(s_NN)=200_ GeV
• Particle spectra in Pb-Pb collisions at 2.76 TeV
• Hydrodynamic Approaches in Relativistic Heavy Ion Reactions
• Effects of Bulk Viscosity at Freezeout
• Transverse mass dependence of two-pion correlations in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at sqrt(s_NN) = 200 GeV
• Boson Interferometry in High Energy Physics
• Viscous Hydrodynamic Predictions for Nuclear Collisions at the LHC
• Bulk viscosity, particle spectra and flow in heavy-ion collisions
• Topics on Hydrodynamic Model of Nucleus-Nucleus Collisions
• Interplay of shear and bulk viscosity in generating flow in heavy-ion collisions
• A new cross term in the two-particle Hanbury-Brown-Twiss correlation function
• Resolving the HBT Puzzle in Relativistic Heavy Ion Collision
• Elliptic flow in 200 A GeV Au+Au collisions and 2.76 A TeV Pb+Pb collisions: insights from viscous hydrodynamics + hadron cascade hybrid model
• Hadron spectra and elliptic flow for 200 A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade
• Relativistic Dynamics of Non-ideal Fluids: Viscous and heat-conducting fluids I. General Aspects and 3+1 Formulation for Nuclear Collisions
• Bulk Viscosity driven clusterization of quark-gluon plasma and early freeze-out in relativistic heavy-ion collisions
• Extracting Source Parameters from Gaussian Fits to Two-Particle Correlations
• Collision Energy Dependence of Viscous Hydrodynamic Flow in Relativistic Heavy-Ion Collisions
• Dilepton emission in high-energy heavy-ion collisions with viscous hydrodynamics
• Thermalization, Isotropization and Elliptic Flow from Nonequilibrium Initial Conditions with a Saturation Scale
• Centrality dependence of pion freeze-out radii in Pb-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathbf{NN}}}$=2.76 TeV
• Hydrodynamics at RHIC and LHC: What have we learned?
• Spinodal decomposition during the hadronization stage at RHIC?
• Source Dimensions in Ultrarelativistic Heavy Ion Collisions
• Azimuthal Dependence of Pion Interferometry at the AGS
• Dissipative hydrodynamics in 2+1 dimension
• Relativistic Dissipative Hydrodynamic Equations at the Second Order for Multi-Component Systems with Multiple Conserved Currents
• Femtoscopy in Relativistic Heavy Ion Collisions and its Relation to Bulk Properties of QCD Matter
• Dynamical Growth Rate of a Diffuse Interface in First Order Phase Transitions
• Pion Interferometry for a Granular Source of Quark-Gluon Plasma Droplets
• Constraining the initial temperature and shear viscosity in a hybrid hydrodynamic model of $\sqrt{s_{NN}}$=200 GeV Au+Au collisions using pion spectra, elliptic flow, and femtoscopic radii
• Analysis of pion elliptic flows and HBT interferometry in a granular quark-gluon plasma droplet model
• 2+1 dimensional hydrodynamics including bulk viscosity: a systematics study
• Anisotropic flow of identified particles in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV measured with ALICE at the LHC
• Characteristic quantities of pion-emitting sources extracted by model-independent analysis in relativistic heavy ion collisions
• Hydrodynamical description of collective flow
• Initial state fluctuations and final state correlations: Status and open questions
• Introduction to Hydrodynamics
• Interferometry radii in heavy-ion collisions at 200GeV and 2.76TeV
• Two-particle interferometry for the sources undergoing first-order QCD phase transition in high energy heavy ion collisions
• Detection of source inhomogeneity through event-by-event two-pion Bose-Einstein correlations
• Pion Transverse Momentum Spectrum, Elliptic Flow and Interferometry in the Granular Source Model in Ultra-Relativistic Heavy Ion Collisions

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