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Verfasst von:Adamová, Dagmar [VerfasserIn]   i
 Bielčíková, Jana [VerfasserIn]   i
 Braun-Munzinger, Peter [VerfasserIn]   i
 Busch, Oliver [VerfasserIn]   i
 Damjanović, Sanja [VerfasserIn]   i
 Dietrich, Lars [VerfasserIn]   i
 Esumi, ShinIchi [VerfasserIn]   i
 Filimonov, Kirill [VerfasserIn]   i
 Glässel, Peter [VerfasserIn]   i
 Krobath, Gernot [VerfasserIn]   i
 Milošević, Jovan [VerfasserIn]   i
 Petráček, Vojtech [VerfasserIn]   i
 Stachel, Johanna [VerfasserIn]   i
 Tilsner, Heinz [VerfasserIn]   i
 Wessels, Johannes P. [VerfasserIn]   i
 Wienold, Thomas [VerfasserIn]   i
 Yurevich, Sergey [VerfasserIn]   i
 Dubitzky, Wilrid [VerfasserIn]   i
Titel:Elliptic flow of charged pions, protons and strange particles emitted in Pb + Au collisions at top SPS energy
Verf.angabe:CERES Collaboration: D. Adamová, G. Agakichiev, 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, 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
E-Jahr:2012
Jahr:6 September 2012
Umfang:33 S.
Fussnoten:Gesehen am 06.12.2018
Titel Quelle:Enthalten in: Nuclear physics <Amsterdam> / A
Ort Quelle:Amsterdam : North-Holland Publ. Co., 1967
Jahr Quelle:2012
Band/Heft Quelle:894(2012), Seite 41-73
ISSN Quelle:1873-1554
Abstract:Differential elliptic flow spectra v2(pT) of π−, KS0, p, Λ have been measured at sNN=17.3 GeV around midrapidity by the CERN-CERES/NA45 experiment in mid-central Pb+Au collisions (10% of σgeo). The pT range extends from about 0.1 GeV/c (0.55 GeV/c for Λ) to more than 2 GeV/c. Protons below 0.4 GeV/c are directly identified by dE/dx. At higher pT, proton elliptic flow is derived as a constituent, besides π+ and K+, of the elliptic flow of positive pion candidates. This retrieval requires additional inputs: (i) of the particle composition, and (ii) of v2(pT) of positive pions. For (i), particle ratios obtained by NA49 are adapted to CERES conditions; for (ii), the measured v2(pT) of negative pions is substituted, assuming π+ and π− elliptic flow magnitudes to be sufficiently close. The v2(pT) spectra are compared to ideal-hydrodynamics calculations. In synopsis of the series π−-KS0-p-Λ, flow magnitudes are seen to fall with decreasing pT progressively even below hydro calculations with early kinetic freeze-out (Tf=160 MeV) leaving not much time for hadronic evolution. The proton v2(pT) data show a downward swing towards low pT with excursions into negative v2 values. The pion-flow isospin asymmetry observed recently by STAR at RHIC, invalidating in principle our working assumption, is found in its impact on proton flow bracketed from above by the direct proton flow data, and not to alter any of our conclusions. Results are discussed in perspective of recent viscous hydrodynamics studies which focus on late hadronic stages.
DOI:doi:10.1016/j.nuclphysa.2012.08.004
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: http://dx.doi.org/10.1016/j.nuclphysa.2012.08.004
 Volltext: http://www.sciencedirect.com/science/article/pii/S0375947412002382
 DOI: https://doi.org/10.1016/j.nuclphysa.2012.08.004
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Flow
 Strangeness
 Viscosity
K10plus-PPN:1582137935
Verknüpfungen:→ Zeitschrift

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