Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Schwerionenkollisionen und QCD Phasen

HK 19.7: Vortrag

Dienstag, 18. März 2014, 15:45–16:00, HZ 6

Investigation of Mach cones and the corresponding two-particle correlations in a microscopic transport model — •Ioannis Bouras¹, Barbara Betz¹, Zhe Xu², and Carsten Greiner¹ — ¹Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, D-60438 Frankfurt, Germany — ²Department of Physics, Tsinghua University, Beijing, China

Using a microscopic transport model we investigate the evolution of conical structures originating from the supersonic jet through the hot matter and dense matter of ultra-relativistic heavy-ion collisions. We found that the Mach cone angle is influenced by the source term properties, energy deposition and viscosity. While in a static medium a possible double-peak structure is overshadowed by the diffusion wake and head shock, it turns out that in central heavy-ion collisions due to the radial flow of the expanding medium a double-peak structure is visible. On the one hand this is mainly contributed from Mach cones propagating into the opposite direction of the radial flow, while on the other hand deflected jets may also contribute to a final double-peak structure. The corresponding double-peak structure is observed insofar the shear viscosity over entropy density ratio is sufficiently small, while a larger dissipation destroys any kind of Mach cone and/or double-peak structure.