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

Abstract

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 observablesmore » considered allow to critically verify the quality of the description based on first-principle input to the hydrodynamic evolution.« less

Authors:
 [1];  [1];  [2];  [3]; ORCiD logo [3];  [2]
+ Show Author Affiliations
  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)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1483751
Alternate Identifier(s):
OSTI ID: 1636504
Report Number(s):
BNL-209510-2018-JAAM
Journal ID: ISSN 0375-9474
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 979; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Initial conditions; Fluid dynamics; Transport coefficients

Citation Formats

Dubla, Andrea, Masciocchi, S., Pawlowski, J. M., Schenke, Bjoern, Shen, C., and Stachel, J.. Towards QCD-assisted hydrodynamics for heavy-ion collision phenomenology. United States: N. p., 2018. Web. https://doi.org/10.1016/j.nuclphysa.2018.09.046.
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Dubla, Andrea, Masciocchi, S., Pawlowski, J. M., Schenke, Bjoern, Shen, C., & Stachel, J.. Towards QCD-assisted hydrodynamics for heavy-ion collision phenomenology. United States. https://doi.org/10.1016/j.nuclphysa.2018.09.046
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Dubla, Andrea, Masciocchi, S., Pawlowski, J. M., Schenke, Bjoern, Shen, C., and Stachel, J.. Tue . "Towards QCD-assisted hydrodynamics for heavy-ion collision phenomenology". United States. https://doi.org/10.1016/j.nuclphysa.2018.09.046. https://www.osti.gov/servlets/purl/1483751.
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@article{osti_1483751,
title = {Towards QCD-assisted hydrodynamics for heavy-ion collision phenomenology},
author = {Dubla, Andrea and Masciocchi, S. and Pawlowski, J. M. and Schenke, Bjoern and Shen, C. and Stachel, J.},
abstractNote = {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.},
doi = {10.1016/j.nuclphysa.2018.09.046},
journal = {Nuclear Physics. A},
number = C,
volume = 979,
place = {United States},
year = {2018},
month = {9}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.nuclphysa.2018.09.046
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Figures / Tables:

Figure 1 Figure 1: Left panel: Analytic function for $η$/s(T) as a function of temperature as given in (2). Right panel: The $ζ$/s(T) parametrization as a function of temperature.
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Works referenced in this record:

Full result for the QCD equation of state with <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:math> flavors
journal, March 2014

Equation of state in ( 2 + 1 )-flavor QCD
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

Quark susceptibility in hot QCD
journal, December 1992

Hydrodynamic predictions for Pb+Pb collisions at 5.02 TeV
journal, June 2017

Moving Forward to Constrain the Shear Viscosity of QCD Matter
journal, May 2016

Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb–Pb collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>
journal, February 2013

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    Fluid dynamics of heavy ion collisions with mode expansion
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    QCD phase structure at finite temperature and density
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      Figures / Tables found in this record:

      Figure 1 (p. 5)figure
      Figure 2 (p. 6)figure
      Figure 3 (p. 8)figure
      Figure 4 (p. 8)figure
      Figure 5 (p. 9)figure
      Figure 6 (p. 9)figure
      Figure 7 (p. 10)figure
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