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@ARTICLE{AbouYassine:247136,
author = {Abou Yassine, R. and Adamczewski-Musch, J. and Asal, C. and
Becker, M. and Belounnas, A. and Blanco, A. and Blume, C.
and Chlad, L. and Chudoba, P. and Ciepał, I. and Cordts, M.
and Dreyer, J. and Esmail, W. A. and Fabbietti, L. and
Floersheimer, H. and Fonte, P. and Friese, J. and Fröhlich,
I. and Förtsch, J. and Galatyuk, T. and Gniazdowski, T. and
Greifenhagen, R. and Grunwald, M. and Gumberidze, M. and
Harabasz, S. and Heinz, T. and Höhne, C. and Hojeij, F. and
Holzmann, R. and Huck, H. and Idzik, M. and Kämpfer, B. and
Kampert, K-H. and Kardan, B. and Kedych, V. and Koenig, I.
and Koenig, Wolfgang and Kohls, M. and Kolas, J. and
Kornakov, G. and Kotte, R. and Kres, I. and Krueger, W. and
Kugler, A. and Lalik, R. and Lebedev, S. and Linev, S. and
Linz, F. and Lopes, L. and Lorenz, M. and Malige, A. and
Markert, J. and Matulewicz, T. and Maurus, S. and Metag, V.
and Michel, J. and Molenda, A. and Müntz, C. and Nabroth,
M. and Naumann, L. and Nowakowski, K. and Orliński, J. and
Otto, J.-H. and Parschau, M. and Pauly, C. and Pechenova, O.
and Pechenov, V. and Pfeifer, D. and Piasecki, K. and
Pietraszko, J. and Povar, T. and Prozorov, A. and Przygoda,
W. and Pysz, K. and Ramstein, B. and Rathod, N. and Ritman,
J. and Rodriguez-Ramos, P. and Rost, A. and Rustamov, A. and
Salabura, P. and Saraiva, J. and Schild, N. and Schwab, E.
and Scozzi, F. and Seck, F. and Selyuzhenkov, I. and Singh,
U. and Skorpil, L. and Smyrski, J. and Spies, S. and
Stefaniak, M. S. and Ströbele, H. and Stroth, J. and
Sumara, K. and Svoboda, O. and Szala, M. and Tlusty, P. and
Traxler, M. and Wagner, V. and Wasiluk, M. and Weber, A. A.
and Wendisch, C. and Wirth, J. and Zbroszczyk, H. P. and
Zherebtsova, E. and Zielinski, M. and Zumbruch, P. and
{HADES collaboration}},
title = {{M}easurement of global polarization of $Λ$ hyperons in
few-{G}e{V} heavy-ion collisions},
journal = {Physics letters / B},
volume = {835},
issn = {0031-9163},
address = {Amsterdam},
publisher = {North-Holland Publ.},
reportid = {GSI-2022-00852, arXiv:2207.05160},
pages = {137506},
year = {2022},
note = {This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/). Funded by
SCOAP3},
abstract = {The global polarization of ${\Lambda}$ hyperons along the
total orbital angular momentum of a relativistic heavy-ion
collision is presented based on the high statistics data
samples collected in Au+Au collisions at $\sqrt{s_{NN}}$ =
2.4 GeV and Ag+Ag at 2.55 GeV with the High-Acceptance
Di-Electron Spectrometer (HADES) at GSI, Darmstadt. This is
the first measurement below the strangeness production
threshold in nucleon-nucleon collisions. Results are
reported as a function of the collision centrality as well
as a function of the hyperon transverse momentum $(p_T)$ and
rapidity $(y_{CM})$ for the range of centrality $0--40\%.$
We observe a strong centrality dependence of the
polarization with an increasing signal towards peripheral
collisions. For mid-central $(20--40\%)$ collisions the
polarization magnitudes are $<P_{\Lambda}>(\%)$ = 6.8 $\pm$
1.3 (stat.) $\pm$ 2.1 (syst.) for Au+Au and
$<P_{\Lambda}>(\%)$ = 6.2 $\pm$ 0.4 (stat.) $\pm$ 0.6
(syst.) for Ag+Ag, which are the largest values observed so
far. This observation thus provides a continuation of the
increasing trend previously observed by STAR and contrasts
expectations from recent theoretical calculations predicting
a maximum in the region of collision energies about 3 GeV.
The observed polarization is of a similar magnitude as
predicted by 3D fluid dynamics and the UrQMD plus thermal
vorticity model and significantly above results from the
AMPT model.},
cin = {HAD / FFN},
ddc = {530},
cid = {I:(DE-Ds200)HAD-20080822OR103 /
I:(DE-Ds200)FFN-20210302OR452},
pnm = {612 - Cosmic Matter in the Laboratory (POF4-612) /
HGF-IVF-VH-NG-823 - VH-NG-823 : HADES/CBM, VIP-QM -
exploring Quark Matter with VIrtual Photons
(HGF-IVF-VH-NG-823) / Physics of hot and dense matter -
Experiment (HFHF project) (I:(DE-Ds200)HFHF-HI-Exp)},
pid = {G:(DE-HGF)POF4-612 / G:(DE-Ds200)HGF-IVF-VH-NG-823 /
I:(DE-Ds200)HFHF-HI-Exp},
experiment = {EXP:(DE-Ds200)S520-20200803},
typ = {PUB:(DE-HGF)16},
eprint = {2207.05160},
howpublished = {arXiv:2207.05160},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2207.05160;\%\%$},
UT = {WOS:000912783600007},
doi = {10.1016/j.physletb.2022.137506},
url = {https://repository.gsi.de/record/247136},
}