Darmstadt 2008 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 39: Physik mit schweren Ionen
HK 39.3: Talk
Thursday, March 13, 2008, 17:30–17:45, 2E
Jet Propagation and Mach Cones in (3+1)d Ideal Hydrodynamics — •Barbara Betz1,2, Miklos Gyulassy3, Dirk Rischke1,4, Horst Stöcker1,4,5, and Giorgio Torrieri1 — 1Institut für Theoretische Physik, J.W. Goethe-Universität, Frankfurt am Main — 2Helmholtz Research School, Universität Frankfurt, GSI and FIAS — 3Department of Physics, Columbia University, New York — 4Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main — 5Gesellschaft für Schwerionenforschung, GSI, Darmstadt
The observation of jet quenching and associated away–side Mach Cone–like correlations at RHIC provide powerful “external” probes of the sQGP produced in A+A reactions [1]. However, the details of the fluid response to jets are shown to depend critically on the energy, longitudinal, and transverse momentum deposition mechanisms. We solve numerically covariant 3–dimensional hydrodynamics [2] to compute the flow correlation patterns resulting from a variety of possible energy-momentum deposition models. Mach Cone correlations only survive the hydro decoupling freeze-out phase for a special limited class of energy–momentum loss models. We conclude that the correct interpretation of away–side jet correlations will require improved understanding of the jet energy–momentum loss to fluid couplings.
[1] M. Gyulassy, P. Levai and I. Vitev, Nucl. Phys. B 594, 371 (2001); J. G. Ulery [for the STAR Collab.], arXiv:0704.0224 [nucl-ex]; N. N. Ajitanand [PHENIX Collab.], Nucl. Phys. A 783, 519 (2007).
[2] D. H. Rischke, Y. Pürsün, J. A. Maruhn, H. Stöcker and W. Greiner, Heavy Ion Phys. 1 (1995) 309.