期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.181601
关键词
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资金
- RyC Fellowship [2009SGR502, FP7-PEOPLE-2012-GIG-333786]
- Netherlands Organization for Scientific Research under the NWO Veni scheme (UvA)
- National Science Centre [2012/07/B/ST2/03794]
- ERC [StG HoloLHC-306605, 2009SGR168]
- Utrecht University Foundations of Science
- [FPA2010-20807]
- [CPAN CSD 2007-00042]
- [Consolider-Ingenio 2010]
- ICREA Funding Source: Custom
We numerically simulate planar shock wave collisions in anti-de Sitter space as a model for heavy ion collisions of large nuclei. We uncover a crossover between two different dynamical regimes as a function of the collision energy. At low energies the shocks first stop and then explode in a manner approximately described by hydrodynamics, in close similarity with the Landau model. At high energies the receding fragments move outwards at the speed of light, with a region of negative energy density and negative longitudinal pressure trailing behind them. The rapidity distribution of the energy density at late times around midrapidity is not approximately boost invariant but Gaussian, albeit with a width that increases with the collision energy.
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