Heavy quark diffusion coefficient during hydrodynamization : non-equilibrium vs. equilibrium
Abstract
We compute the heavy quark momentum diffusion coefficient using effective kinetic theory for a system going through bottom-up isotropization until approximate hydrodynamization. We find that when comparing the nonthermal diffusion coefficient to the thermal one for the same energy density, the observed deviations throughout the whole evolution are within 30% from the thermal value. For thermal systems matched to other quantities we observe considerably larger deviations. We also observe that the diffusion coefficient in the transverse direction dominates at large occupation number, whereas for an underoccupied system the longitudinal diffusion coefficient dominates. Similarly, we study the jet quenching parameter, where we obtain a smooth evolution connecting the large values of the glasma phase with the smaller values in the hydrodynamical regime.
Main Authors
Format
Conferences
Conference paper
Published
2024
Series
Subjects
Publication in research information system
Publisher
Sissa Medialab
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202406074414Use this for linking
Review status
Peer reviewed
ISSN
1824-8039
DOI
https://doi.org/10.22323/1.438.0091
Conference
International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions
Language
English
Published in
POS Proceedings of Science
Is part of publication
HardProbes2023: 11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions
Citation
- Peuron, J., Boguslavski, K., Kurkela, A., Lappi, T., & Lindenbauer, F. (2024). Heavy quark diffusion coefficient during hydrodynamization : non-equilibrium vs. equilibrium. In HardProbes2023: 11th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Article 091). Sissa Medialab. POS Proceedings of Science, 438. https://doi.org/10.22323/1.438.0091
License
Funder(s)
Research Council of Finland
European Commission
European Commission
Research Council of Finland
Funding program(s)
Centre of Excellence, AoF
RIA Research and Innovation Action, H2020
ERC Advanced Grant
Academy Project, AoF
Huippuyksikkörahoitus, SA
RIA Research and Innovation Action, H2020
ERC Advanced Grant
Akatemiahanke, SA
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.
Additional information about funding
This work is supported by the European Research Council, ERC-2018-ADG-835105 YoctoLHC. This work was also supported under the European Union’s Horizon 2020 research and innovation by the STRONG-2020 project (grant agreement No. 824093).The content of this article does not reflect the official opinion of the European Union and responsibility for the information and views expressed therein lies entirely with the authors. This work was funded in part by the Knut and Alice Wallenberg foundation, contract number 2017.0036. TL and JP have been supported by the Academy of Finland, by the Centre of Excellence in Quark Matter (project 346324) and project 321840. KB and FL would like to thank the Austrian Science Fund (FWF) for support under project P 34455, and FL is additionally supported by the Doctoral Program W1252-N27 Particles and Interactions. The authors wish to acknowledge CSC – IT Center for Science, Finland, for computational resources. We acknowledge grants of computer capacity from the Finnish Grid and Cloud Infrastructure (persistent identifier urn:nbn:fi:research infras-2016072533 ). The authors wish to acknowledge the Vienna Scientific Cluster (VSC) project 71444 for computational resources.
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