dorsal/arxiv
View SchemaBoundary Conditions of the Hydro-Cascade Model and Relativistic Kinetic Equations for Finite Domains
| Authors | K. A. Bugaev |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0401060 |
| URL | https://arxiv.org/abs/nucl-th/0401060 |
| DOI | 10.1103/PhysRevC.70.034903 |
| Journal | Phys.Rev. C70 (2004) 034903 |
Abstract
A detailed analysis of the coupled relativistic kinetic equations for two domains separated by a hypersurface having both space- and time-like parts is presented. Integrating the derived set of transport equations, we obtain the correct system of the hydro+cascade equations to model the relativistic nuclear collision process. Remarkably, the conservation laws on the boundary between domains conserve separately both the incoming and outgoing components of energy, momentum and baryonic charge. Thus, the relativistic kinetic theory generates twice the number of conservation laws compared to traditional hydrodynamics. Our analysis shows that these boundary conditions between domains, the three flux discontinuity, can be satisfied only by a special superposition of two cut-off distribution functions for the ``out'' domain. All these results are applied to the case of the phase transition between quark gluon plasma and hadronic matter. The possible consequences for an improved hydro+cascade description of the relativistic nuclear collisions are discussed. The unique properties of the three flux discontinuity and their effect on the space-time evolution of the transverse expansion are also analyzed. The possible modifications of both transversal radii from pion correlations generated by a correct hydro+cascade approach are discussed.
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"abstract": "A detailed analysis of the coupled relativistic kinetic equations for two\ndomains separated by a hypersurface having both space- and time-like parts is\npresented. Integrating the derived set of transport equations, we obtain the\ncorrect system of the hydro+cascade equations to model the relativistic nuclear\ncollision process. Remarkably, the conservation laws on the boundary between\ndomains conserve separately both the incoming and outgoing components of\nenergy, momentum and baryonic charge. Thus, the relativistic kinetic theory\ngenerates twice the number of conservation laws compared to traditional\nhydrodynamics. Our analysis shows that these boundary conditions between\ndomains, the three flux discontinuity, can be satisfied only by a special\nsuperposition of two cut-off distribution functions for the ``out\u0027\u0027 domain. All\nthese results are applied to the case of the phase transition between quark\ngluon plasma and hadronic matter. The possible consequences for an improved\nhydro+cascade description of the relativistic nuclear collisions are discussed.\nThe unique properties of the three flux discontinuity and their effect on the\nspace-time evolution of the transverse expansion are also analyzed. The\npossible modifications of both transversal radii from pion correlations\ngenerated by a correct hydro+cascade approach are discussed.",
"arxiv_id": "nucl-th/0401060",
"authors": [
"K. A. Bugaev"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.70.034903",
"journal_ref": "Phys.Rev. C70 (2004) 034903",
"title": "Boundary Conditions of the Hydro-Cascade Model and Relativistic Kinetic Equations for Finite Domains",
"url": "https://arxiv.org/abs/nucl-th/0401060"
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