The v31/3/v21/2 ratio in PbAu collisions at sNN= 17.3 GeV: a hint of a hydrodynamic behavior

CERES/NA45 Collaboration

doi:10.1140/epjc/s10052-024-13416-y

The v31/3/v21/2 ratio in PbAu collisions at sNN= 17.3 GeV: a hint of a hydrodynamic behavior

CERES/NA45 Collaboration

Physics and Astronomy

Czech Academy of Sciences
Joint Institute for Nuclear Research
University of Münster
Goethe University Frankfurt
Max Planck Institute for Nuclear Physics
Czech Technical University in Prague
GSI Helmholtz Centre for Heavy Ion Research
Heidelberg University
Weizmann Institute of Science
University of Tsukuba
University of California at Berkeley
University of Belgrade
Huzhou University
Pavol Jozef Šafárik University
Brookhaven National Laboratory

Research output: Contribution to journal › Article › peer-review

Abstract

The Fourier harmonics, v₂ and v₃ of negative pions are measured at center-of-mass energy per nucleon pair of s_NN= 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 p_T from 0.05 GeV/c to more than 2 GeV/c. This is the first measurement of the v₃^1/3/v₂^1/2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For p_T 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.

Original language	English
Article number	1090
Journal	European Physical Journal C
Volume	84
Issue number	10
DOIs	https://doi.org/10.1140/epjc/s10052-024-13416-y
State	Published - Oct 2024

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@article{b699f415a54543c794d345c854e0984c,

title = "The v31/3/v21/2 ratio in PbAu collisions at sNN= 17.3 GeV: a hint of a hydrodynamic behavior",

abstract = "The Fourier harmonics, v2 and 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 v31/3/v21/2 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.",

author = "CERES/NA45 Collaboration and D. Adamov{\'a} and G. Agakishiev and A. Andronic and D. Anto{\'n}czyk and H. Appelsh{\"a}user and V. Belaga and J. Biel{\v c}{\'i}kov{\'a} and P. Braun-Munzinger and O. Busch and A. Cherlin and S. Damjanovi{\'c} and T. Dietel and L. Dietrich and A. Drees and W. Dubitzky and Esumi, \{S. I.\} and K. Filimonov and K. Fomenko and Z. Fraenkel and C. Garabatos and P. Gl{\"a}ssel and G. Hering and J. Holeczek and M. Kalisky and G. Krobath and V. Kushpil and A. Maas and A. Mar{\'i}n and J. Milo{\v s}evi{\'c} and D. Mi{\'s}kowiec and Y. Panebrattsev and Z. Paul{\'i}nyov{\'a} and O. Petchenova and V. Petr{\'a}{\v c}ek and S. Radomski and J. Rak and I. Ravinovich and P. Rehak and H. Sako and W. Schmitz and S. Schuchmann and S. Sedykh and S. Shimansky and J. Stachel and M. {\v S}umbera and H. Tilsner and I. Tserruya and G. Tsiledakis and Wessels, \{J. P.\} and T. Wienold",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = oct,

doi = "10.1140/epjc/s10052-024-13416-y",

language = "English",

volume = "84",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "10",

}

TY - JOUR

T1 - The v31/3/v21/2 ratio in PbAu collisions at sNN= 17.3 GeV

T2 - a hint of a hydrodynamic behavior

AU - CERES/NA45 Collaboration

AU - Adamová, D.

AU - Agakishiev, G.

AU - Andronic, A.

AU - Antończyk, D.

AU - Appelshäuser, H.

AU - Belaga, V.

AU - Bielčíková, J.

AU - Braun-Munzinger, P.

AU - Busch, O.

AU - Cherlin, A.

AU - Damjanović, S.

AU - Dietel, T.

AU - Dietrich, L.

AU - Drees, A.

AU - Dubitzky, W.

AU - Esumi, S. I.

AU - Filimonov, K.

AU - Fomenko, K.

AU - Fraenkel, Z.

AU - Garabatos, C.

AU - Glässel, P.

AU - Hering, G.

AU - Holeczek, J.

AU - Kalisky, M.

AU - Krobath, G.

AU - Kushpil, V.

AU - Maas, A.

AU - Marín, A.

AU - Milošević, J.

AU - Miśkowiec, D.

AU - Panebrattsev, Y.

AU - Paulínyová, Z.

AU - Petchenova, O.

AU - Petráček, V.

AU - Radomski, S.

AU - Rak, J.

AU - Ravinovich, I.

AU - Rehak, P.

AU - Sako, H.

AU - Schmitz, W.

AU - Schuchmann, S.

AU - Sedykh, S.

AU - Shimansky, S.

AU - Stachel, J.

AU - Šumbera, M.

AU - Tilsner, H.

AU - Tserruya, I.

AU - Tsiledakis, G.

AU - Wessels, J. P.

AU - Wienold, T.

PY - 2024/10

Y1 - 2024/10

N2 - The Fourier harmonics, v2 and 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 v31/3/v21/2 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.

AB - The Fourier harmonics, v2 and 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 v31/3/v21/2 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.

UR - https://www.scopus.com/pages/publications/85207161581

U2 - 10.1140/epjc/s10052-024-13416-y

DO - 10.1140/epjc/s10052-024-13416-y

M3 - Article

AN - SCOPUS:85207161581

SN - 1434-6044

VL - 84

JO - European Physical Journal C

JF - European Physical Journal C

IS - 10

M1 - 1090

ER -

The v31/3/v21/2 ratio in PbAu collisions at sNN= 17.3 GeV: a hint of a hydrodynamic behavior

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