Heavy quark diffusion in an overoccupied gluon plasma
Peuron, J. LU
(2022)
38th International Symposium on Lattice Field Theory, LATTICE 2021
In Proceedings of Science
396.
- Abstract
We extract the heavy quark diffusion coefficient k and the resulting momentum broadening h p2i of a heavy quark embedded in a far-from-equilibrium gluon plasma using classical-statistical lattice simulations. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of h p2i, 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... (More)
We extract the heavy quark diffusion coefficient k and the resulting momentum broadening h p2i of a heavy quark embedded in a far-from-equilibrium gluon plasma using classical-statistical lattice simulations. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of h p2i, 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.
(Less)
- author
- Peuron, J.
LU
- organization
- publishing date
- 2022-07-08
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 38th International Symposium on Lattice Field Theory, LATTICE 2021
- series title
- Proceedings of Science
- volume
- 396
- article number
- 291
- publisher
- Proceedings of Science
- conference name
- 38th International Symposium on Lattice Field Theory, LATTICE 2021
- conference location
- Virtual, Online, United States
- conference dates
- 2021-07-26 - 2021-07-30
- external identifiers
-
- scopus:85134431505
- ISSN
- 1824-8039
- language
- English
- LU publication?
- yes
- id
- d9ba879c-811f-433c-8c90-28b7efff3780
- alternative location
- https://pos.sissa.it/396/291/pdf
- date added to LUP
- 2022-08-24 14:13:25
- date last changed
- 2024-04-14 07:19:25
@inproceedings{d9ba879c-811f-433c-8c90-28b7efff3780,
abstract = {{<p>We extract the heavy quark diffusion coefficient k and the resulting momentum broadening h p<sup>2</sup>i of a heavy quark embedded in a far-from-equilibrium gluon plasma using classical-statistical lattice simulations. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of h p<sup>2</sup>i, 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.</p>}},
author = {{Peuron, J.}},
booktitle = {{38th International Symposium on Lattice Field Theory, LATTICE 2021}},
issn = {{1824-8039}},
language = {{eng}},
month = {{07}},
publisher = {{Proceedings of Science}},
series = {{Proceedings of Science}},
title = {{Heavy quark diffusion in an overoccupied gluon plasma}},
url = {{https://pos.sissa.it/396/291/pdf}},
volume = {{396}},
year = {{2022}},
}