202 articles – 1867 Notices  [english version]
 HAL : in2p3-00711874, version 1
 arXiv : 1206.5528
 Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt(s_(NN))$ = 7.7 - 39 GeVAdamczyk L., Borowski W., Kabana S.Physical Review C 86 (2012) 054908 - http://hal.in2p3.fr/in2p3-00711874
Physique/Physique Nucléaire Expérimentale
Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
L. Adamczyk, W. Borowski1, S. Kabana1
 1 : SUBATECH - Laboratoire SUBATECH Nantes http://www-subatech.in2p3.fr/ CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes 4, rue Alfred Kastler - 44070 Nantes Cedex 03 France
A systematic study is presented for centrality, transverse momentum ($p_T$) and pseudorapidity ($\eta$) dependence of the inclusive charged hadron elliptic flow ($v_2$) at midrapidity ($|\eta| < 1.0$) in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27 and 39 GeV. The results obtained with different methods, including correlations with the event plane reconstructed in a region separated by a large pseudorapidity gap, and 4-particle cumulants ($v_2\{4\}$), are presented in order to investigate non-flow correlations and $v_2$ fluctuations. We observe that the difference between $v_2\{2\}$ and $v_2\{4\}$ is smaller at the lower collision energies. Values of $v_2$, scaled by the initial coordinate space eccentricity, $v_{2}/\varepsilon$, as a function of $p_T$ are larger in more central collisions, suggesting stronger collective flow develops in more central collisions, similar to the results at higher collision energies. These results are compared to measurements at higher energies at RHIC ($\sqrt{s_{NN}}$ = 62.4 and 200 GeV) and at LHC (Pb + Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV). The $v_2(p_T)$ values for fixed $p_T$ rise with increasing collision energy within the $p_T$ range studied ($< 2 {\rm GeV}/c$). We compare the $v_2$ results to UrQMD and AMPT transport model calculations, and physics implications on the dominance of partonic versus hadronic phases in the system created at BES energies are discussed.
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Articles dans des revues avec comité de lecture
2012
 Physical Review C (Phys. Rev. C) Publisher American Physical Society ISSN 0556-2813 (eISSN : 1089-490X)
86
054908

SUBATECH-Plasma
19 pages, 11 figures ; see paper for full list of authors
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1206.5528
 in2p3-00711874, version 1 http://hal.in2p3.fr/in2p3-00711874 oai:hal.in2p3.fr:in2p3-00711874 Contributeur : Sylvie Florès <> Soumis le : Mardi 26 Juin 2012, 07:27:25 Dernière modification le : Lundi 28 Octobre 2013, 11:33:31