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arXiv · 1003.1232

Conical Emission from Shock Waves in Ne(1-20 AGeV)+U Collisions

Philip Rau·Jan Steinheimer·Barbara Betz·Hannah Petersen·Marcus Bleicher·Horst Stöcker
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Abstract

The formation and propagation of high-density compression waves, e.g. Mach shock waves, in cold nuclear matter is studied by simulating high-energy nucleus-nucleus collisions of Ne with U in the energy range from E_lab = 0.5 AGeV to 20 AGeV. In an ideal hydrodynamic approach, the high-density shock wave created by the small Ne nucleus passing through the heavy U nucleus is followed by a slower and more dilute Mach shock wave which causes conical emission of particles at the Mach cone angle. The conical emission originates from low-density regions with a small flow velocity comparable to the speed of sound. Moreover, it is shown that the angular distributions of emitted baryons clearly distinguish between a hydrodynamic approach and binary cascade processes used in the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport model.

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Philip Rau, Jan Steinheimer, Barbara Betz, Hannah Petersen, Marcus Bleicher, Horst Stöcker. 2010-03-05. Conical Emission from Shock Waves in Ne(1-20 AGeV)+U Collisions. https://arxiv.org/abs/1003.1232

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