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 »
- Authors:
-
[3];
- Univ. Heidelberg, Heidelberg (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
- Univ. Heidelberg, Heidelberg (Germany)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (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. doi:10.1016/j.nuclphysa.2018.09.046.
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
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.
@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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Figures / Tables:
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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