Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Schwerionenkollisionen und QCD Phasen
HK 19.4: Vortrag
Dienstag, 18. März 2014, 15:00–15:15, HZ 6
Studying the collision energy dependence of elliptic and triangular flow with a hybrid model — •Jussi Auvinen1 and Hannah Petersen1,2 — 1Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany — 2Institut für Theoretische Physik, Goethe Universität, Frankfurt am Main, Germany
Elliptic flow has been one of the key observables for establishing the finding of the quark-gluon plasma (QGP) at the highest energies of Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). As a sign of collectively behaving matter, the elliptic flow is expected to decrease at lower beam energies, where the QGP is not produced. However, in the recent RHIC beam energy scan, it has been found that the inclusive charged hadron elliptic flow changes relatively little in magnitude within the energy range 7.7 - 39 GeV per nucleon-nucleon collision.
We study the collision energy dependence of the elliptic and triangular flow utilizing a Boltzmann+hydrodynamics hybrid model described in [1,2]. Such a hybrid model provides a natural framework for the transition from high collision energies, where the hydrodynamical description is essential, to smaller energies, where the hadron transport dominates. This approach is thus suitable for investigating the relative importance of these two mechanisms for the production of the collective flow at different beam energies.
References: [1] H. Petersen, J. Steinheimer, G. Burau, M. Bleicher and H. Stocker, Phys. Rev. C78, 044901 (2008). [2] J. Auvinen and H. Petersen, arXiv:1310.1764.