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Title: Towards QCD-assisted hydrodynamics for heavy-ion collision phenomenology

Journal Article · · Nuclear Physics. A
 [1];  [1];  [2];  [3]; ORCiD logo [3];  [2]
  1. Univ. Heidelberg, Heidelberg (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  2. Univ. Heidelberg, Heidelberg (Germany)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

Heavy-ion collisions are well described by a dynamical evolution with a long hydrodynamical phase. In this phase the properties of the strongly coupled quark-gluon plasma are reflected in the equation of state (EoS) and the transport coefficients, most prominently by the shear and bulk viscosity over entropy density ratios η/s(T) and ς/s(T), respectively. While the EoS is by now known to a high accuracy, the transport coefficients and in particular their temperature and density dependence are not well known from first-principle computations yet, as well as the possible influence they can have once used in hydrodynamical simulations. In this work, the most recent QCD-based parameters are provided as input to the MUSIC framework. A ratio η/s(T) computed with a QCD based approach is used for the first time [1, 2]. The IP-Glasma model is used to describe the initial energy density distribution, and UrQMD for the dilute hadronic phase. Simulations are performed for Pb–Pb collisions at √sNN = 2.76 TeV, for different centrality intervals. The resulting kinematic distributions of the particles produced in the collisions are compared to data from the LHC, for several experimental observables. Furthermore, the high precision of the experimental results and the broad variety of observables considered allow to critically verify the quality of the description based on first-principle input to the hydrodynamic evolution.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
SC0012704
OSTI ID:
1483751
Alternate ID(s):
OSTI ID: 1636504; OSTI ID: 22888844
Report Number(s):
BNL--209510-2018-JAAM; {"","Journal ID: ISSN 0375-9474"}
Journal Information:
Nuclear Physics. A, Journal Name: Nuclear Physics. A Journal Issue: C Vol. 979; ISSN 0375-9474
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Conformal relativistic viscous hydrodynamics: Applications to RHIC results at s NN = 200 GeV journal September 2008
Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb–Pb collisions at sNN=2.76 TeV journal February 2013
Transport Coefficients of a Gluon Plasma journal February 2005
Hydrodynamic approaches in relativistic heavy ion reactions journal January 2016
Hydrodynamic predictions for Pb+Pb collisions at 5.02 TeV journal June 2017
Event-by-event fluctuations in a perturbative QCD + saturation + hydrodynamics model: Determining QCD matter shear viscosity in ultrarelativistic heavy-ion collisions journal February 2016
Effects of bulk viscosity and hadronic rescattering in heavy ion collisions at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider journal March 2018
Microscopic models for ultrarelativistic heavy ion collisions journal January 1998
Effect of bulk viscosity on elliptic flow near the QCD phase transition journal December 2009
Importance of the Bulk Viscosity of QCD in Ultrarelativistic Heavy-Ion Collisions journal September 2015
Self-consistent spectral functions in the O ( N ) model from the functional renormalization group journal April 2017
Higher flow harmonics from ( 3 + 1 ) D event-by-event viscous hydrodynamics journal February 2012
Quark-antiquark potential in the analytic approach to QCD journal October 2000
Nonperturbative finite-temperature Yang-Mills theory journal March 2018
Transport Coefficients in Yang-Mills Theory and QCD journal September 2015
Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics journal March 2005
Fluctuating Glasma Initial Conditions and Flow in Heavy Ion Collisions journal June 2012
Hydrodynamic Modeling of Heavy-Ion Collisions journal April 2013
Shear-Viscosity to Entropy-Density Ratio of a Relativistic Hadron Gas journal May 2009
Full result for the QCD equation of state with 2+1 flavors journal March 2014
The iEBE-VISHNU code package for relativistic heavy-ion collisions journal February 2016
Flow equations for spectral functions at finite external momenta journal October 2014
Equation of state in ( 2 + 1 )-flavor QCD journal November 2014
The QCD equation of state at finite density from analytical continuation journal January 2017
Quark susceptibility in hot QCD journal December 1992
Calculation of the shear viscosity in SU(3) gluodynamics journal November 2007
Moving Forward to Constrain the Shear Viscosity of QCD Matter journal May 2016
Real time correlation functions and the functional renormalization group journal November 2015
Confinement from correlation functions journal August 2013
Spectra and elliptic flow for identified hadrons in 2.76 A TeV Pb + Pb collisions journal March 2014
Thermal dynamics on the lattice with exponentially improved accuracy journal March 2018
Gluon spectral functions and transport coefficients in Yang-Mills theory journal November 2014
Applying Bayesian parameter estimation to relativistic heavy-ion collisions: Simultaneous characterization of the initial state and quark-gluon plasma medium journal August 2016
Statistical-Mechanical Theory of Irreversible Processes. I. General Theory and Simple Applications to Magnetic and Conduction Problems journal June 1957
Transient relativistic thermodynamics and kinetic theory journal April 1979
Event-by-event gluon multiplicity, energy density, and eccentricities in ultrarelativistic heavy-ion collisions journal September 2012
Influence of Shear Viscosity of Quark-Gluon Plasma on Elliptic Flow in Ultrarelativistic Heavy-Ion Collisions journal May 2011
Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at s NN = 2.76     TeV journal January 2011
Higher Harmonic Anisotropic Flow Measurements of Charged Particles in Pb-Pb Collisions at s N N = 2.76     TeV journal July 2011
QCD equation of state to O ( μ B 6 ) from lattice QCD journal March 2017
Shear viscosity of a hadron gas and influence of resonance lifetimes on relaxation time journal May 2018

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