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@ARTICLE{Wagner:356904,
author = {Wagner, David and Shokri, Masoud and Rischke, Dirk H.},
title = {{D}amping of spin waves},
journal = {Physical review research},
volume = {6},
number = {4},
issn = {2643-1564},
address = {College Park, MD},
publisher = {APS},
reportid = {GSI-2025-00284},
pages = {043103},
year = {2024},
note = {Published by the American Physical Society under the terms
of the Creative Commons Attribution 4.0 International
license.},
abstract = {We show that, in ideal-spin hydrodynamics, the components
of the spin tensor follow damped wave equations. The damping
rate is related to nonlocal collisions of the particles in
the fluid, which enter at first order in in a semiclassical
expansion. This rate provides an estimate for the timescale
of spin equilibration and is computed by considering a
system of spin-1/2 fermions interacting via a quartic
self-interaction as well as via (screened) one-gluon
exchange. It is found that the relaxation times of the
components of the spin tensor can become very large compared
to the usual dissipative timescales of the system. Our
results suggest that the spin degrees of freedom in a
heavy-ion collision may not be in equilibrium by the time of
freeze-out, and thus should be treated dynamically.},
cin = {FHF},
ddc = {530},
cid = {I:(DE-Ds200)FHF-20200605OR451},
pnm = {612 - Cosmic Matter in the Laboratory (POF4-612) / Physics
of hot and dense matter - Theory (HFHF project)
(I:(DE-Ds200)HFHF-HI-Th) / DFG project G:(GEPRIS)315477589 -
TRR 211: Stark wechselwirkende Materie unter extremen
Bedingungen (315477589) / SUC-GSI-Frankfurt - Strategic
university cooperation GSI-U Frankfurt/M (SUC-GSI-FR)},
pid = {G:(DE-HGF)POF4-612 / I:(DE-Ds200)HFHF-HI-Th /
G:(GEPRIS)315477589 / G:(DE-Ds200)SUC-GSI-FR},
experiment = {$EXP:(DE-Ds200)no_experiment-20200803$},
typ = {PUB:(DE-HGF)16},
doi = {10.1103/physrevresearch.6.043103},
url = {https://repository.gsi.de/record/356904},
}