A1 Journal article (refereed)
Limiting attractors in heavy-ion collisions (2024)
Boguslavski, K., Kurkela, A., Lappi, T., Lindenbauer, F., & Peuron, J. (2024). Limiting attractors in heavy-ion collisions. Physics Letters B, 852, Article 138623. https://doi.org/10.1016/j.physletb.2024.138623
JYU authors or editors
Publication details
All authors or editors: Boguslavski, K.; Kurkela, A.; Lappi, T.; Lindenbauer, F.; Peuron, J.
Journal or series: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Publication year: 2024
Publication date: 04/04/2024
Volume: 852
Article number: 138623
Publisher: Elsevier
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.physletb.2024.138623
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94288
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2401.09088
Abstract
We study universal features of the hydrodynamization process in heavy-ion collisions using QCD kinetic theory simulations for a wide range of couplings. We introduce the new concept of limiting attractors, which are obtained by extrapolation to vanishing and strong couplings. While the hydrodynamic limiting attractor emerges at strong couplings and is governed by the viscosityrelated relaxation time scale τR, we identify a bottom-up limiting attractor at weak couplings. It corresponds to the late stages of the perturbative bottom-up thermalization scenario and exhibits isotropization on the time scale τBMSS = α −13/5 s /Qs. In contrast to hydrodynamic limiting attractors, at finite couplings the bottom-up limiting attractor provides a good universal description of the pre-hydrodynamic evolution of jet and heavy-quark momentum broadening ratios ˆq yy/qˆ zz and κT /κz. We also provide parametrizations for these ratios for phenomenological studies of preequilibrium effects on jets and heavy quarks.
Keywords: particle physics; quark-gluon plasma; quantum chromodynamics
Contributing organizations
Related projects
- The strong interaction at the frontier of knowledge: fundamental research and applications- STRONG -2020
- Lappi, Tuomas
- European Commission
- Center of Excellence in Quark Matter
- Lappi, Tuomas
- Research Council of Finland
- Frontiers of high energy QCD
- Lappi, Tuomas
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2024
Preliminary JUFO rating: 3