A1 Journal article (refereed)
Heavy quark diffusion in an overoccupied gluon plasma (2020)
Boguslavski, Kirill; Kurkela, Aleksi; Lappi, Tuomas; Peuron, Jarkko (2020). Heavy quark diffusion in an overoccupied gluon plasma. Journal of High Energy Physics, 2020 (9), 77. DOI: 10.1007/jhep09(2020)077
JYU authors or editors
Publication details
All authors or editors: Boguslavski, Kirill; Kurkela, Aleksi; Lappi, Tuomas; Peuron, Jarkko
Journal or series: Journal of High Energy Physics
ISSN: 1126-6708
eISSN: 1029-8479
Publication year: 2020
Volume: 2020
Issue number: 9
Article number: 77
Publisher: Springer
Publication country: Germany
Publication language: English
DOI: https://doi.org/10.1007/jhep09(2020)077
Open Access: Publication published in an open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71805
Publication is parallel published: http://hdl.handle.net/10138/319335
Abstract
We extract the heavy-quark diffusion coefficient κ and the resulting momentum broadening 〈p2〉 in a far-from-equilibrium non-Abelian plasma. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of 〈p2〉, followed by linear growth with time due to Langevin-type dynamics and damped oscillations around this growth at the plasmon frequency. We show that these novel oscillations are not easily explained using perturbative techniques but result from an excess of gluons at low momenta. These oscillation are therefore a gauge invariant confirmation of the infrared enhancement we had previously observed in gauge-fixed correlation functions. We argue that the kinetic theory description of such systems becomes less reliable in the presence of this IR enhancement.
Keywords: particle physics
Free keywords: Lattice QCD; Quark-Gluon Plasma; Heavy Quark Physics
Contributing organizations
Related projects
- Frontiers of high energy QCD
- Lappi, Tuomas
- Academy of Finland
- CGCglasmaQGP The nonlinear high energy regime of Quantum Chromodynamics
- Lappi, Tuomas
- European Commission
Ministry reporting: Yes
Preliminary JUFO rating: 2