A1 Journal article (refereed)
Heavy quark diffusion in an overoccupied gluon plasma (2020)

Boguslavski, K., Kurkela, A., Lappi, T., & Peuron, J. (2020). Heavy quark diffusion in an overoccupied gluon plasma. Journal of High Energy Physics, 2020(9), Article 77. https://doi.org/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

Publication open access: Openly available

Publication channel open access: 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


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

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2

Last updated on 2022-20-09 at 15:44