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The v1/3 3 /v1/2 2 ratio in PbAu collisions at √sNN = 17.3 GeV: a hint of a hydrodynamic behavior

The Fourier harmonics, v2 v3 of negative pions are measured at center-of-mass energy per nucleon pair of √sNN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0-30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins a...

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Main Authors: Adamová, Dagmar (Author) , Agakishiev, G. (Author) , Andronic, A. (Author) , Antończyk, D. (Author) , Appelshäuser, H. (Author) , Belaga, V. (Author) , Bielčíková, J. (Author) , Braun-Munzinger, P. (Author) , Busch, O. (Author) , Cherlin, A. (Author) , Damjanović, Sanja (Author) , Dietel, T. (Author) , Dietrich, L. (Author) , Drees, A. (Author) , Dubitzky, W. (Author) , Esumi, S. I. (Author) , Filimonov, K. (Author) , Fomenko, K. (Author) , Fraenkel, Z. (Author) , Garabatos, C. (Author) , Glässel, Peter (Author) , Hering, G. (Author) , Holeczek, J. (Author) , Kalisky, M. (Author) , Krobath, G. (Author) , Kushpil, V. (Author) , Maas, A. (Author) , Marín, A. (Author) , Milošević, Jovan (Author) , Miśkowiec, D. (Author) , Panebrattsev, Y. (Author) , Paulínyová, Z. (Author) , Petchenova, O. (Author) , Petráček, Vojtech (Author) , Radomski, S. (Author) , Rak, J. (Author) , Ravinovich, I. (Author) , Rehak, P. (Author) , Sako, H. (Author) , Schmitz, Wolfgang (Author) , Schuchmann, S. (Author) , Sedykh, S. (Author) , Shimansky, S. (Author) , Stachel, Johanna (Author) , Šumbera, M. (Author) , Tilsner, Heinz (Author) , Tserruya, I. (Author) , Tsiledakis, G. (Author) , Wessels, J. P. (Author) , Wienold, Thomas (Author) , Wurm, Johann Peter (Author) , Yurevich, S. (Author) , Yurevich, V. (Author)
Format: Article (Journal)
Language:English
Published: 21 October 2024
In: The European physical journal. C, Particles and fields
Year: 2024, Volume: 84, Issue: 10, Pages: 1-8
ISSN:1434-6052
DOI:10.1140/epjc/s10052-024-13416-y
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-024-13416-y
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Author Notes:CERES/NA45 Collaboration

MARC

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245 1 4 |a The v1/3 3 /v1/2 2 ratio in PbAu collisions at √sNN = 17.3 GeV  |b a hint of a hydrodynamic behavior  |c CERES/NA45 Collaboration 
246 3 3 |a The v 1/3 3 / v 1/2 2 ratio in PbAu collisions at square root sNN = 17.3 GeV 
264 1 |c 21 October 2024 
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500 |a CERES/NA45 Collaboration: D. Adamová, G. Agakishiev, A. Andronic, D. Antończyk, H. Appelshäuser, V. Belaga, J. Bielčíková, P. Braun-Munzinger, O. Busch, A. Cherlin, S. Damjanović, T. Dietel, L. Dietrich, A. Drees, W. Dubitzky, S.I. Esumi, K. Filimonov, K. Fomenko, Z. Fraenkel, C. Garabatos, P. Glässel, G. Hering, J. Holeczek, M. Kalisky, G. Krobath, V. Kushpil, A. Maas, A. Marín, J. Milošević, D. Miśkowiec, Y. Panebrattsev, Z. Paulínyová, O. Petchenova, V. Petráček, S. Radomski, J. Rak, I. Ravinovich, P. Rehak, H. Sako, W. Schmitz, S. Schuchmann, S. Sedykh, S. Shimansky, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, G. Tsiledakis, J.P. Wessels, T. Wienold, J.P. Wurm, S. Yurevich, V. Yurevich 
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520 |a The Fourier harmonics, v2 v3 of negative pions are measured at center-of-mass energy per nucleon pair of √sNN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0-30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum pT from 0.05 GeV/c to more than 2 GeV/c. This is the first measurement of the v1/3 3 / v1/2 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For pT above 0.5 GeV/c, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone. 
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