A1 Journal article (refereed)
Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory (2024)

Boguslavski, K., Kurkela, A., Lappi, T., Lindenbauer, F., & Peuron, J. (2024). Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory. Physical Review D, 109(1), Article 014025. https://doi.org/10.1103/PhysRevD.109.014025

JYU authors or editors

Publication details

All authors or editors: Boguslavski, K.; Kurkela, A.; Lappi, T.; Lindenbauer, F.; Peuron, J.

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2024

Publication date: 22/01/2024

Volume: 109

Issue number: 1

Article number: 014025

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.109.014025

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94661

Publication is parallel published: https://arxiv.org/abs/2303.12520

Abstract

We compute the heavy quark momentum diffusion coefficient κ using QCD kinetic theory for a system going through bottom-up isotropization in the initial stages of a heavy ion collision. We find that the values of κ are within 30% from a thermal system at the same energy density. When matching for other quantities we observe considerably larger deviations. We also observe that the diffusion coefficient in the transverse direction is larger at high occupation numbers, whereas for an underoccupied system the longitudinal diffusion coefficient dominates. The behavior of the diffusion coefficient can be understood on a qualitative level based on the Debye mass mD and the effective temperature of soft modes T∗. Our results for the kinetic evolution of κ in different directions can be used in phenomenological descriptions of heavy quark diffusion and quarkonium dynamics to include the impact of pre-equilibrium stages.

Keywords: particle physics; quarks; quantum chromodynamics

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Related projects

Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 2