dorsal/arxiv
View SchemaSemiclassical transport of particles with dynamical spectral functions
| Authors | W. Cassing, S. Juchem |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9903070 |
| URL | https://arxiv.org/abs/nucl-th/9903070 |
| DOI | 10.1016/S0375-9474(99)00393-0 |
| Journal | Nucl.Phys. A665 (2000) 377-400 |
Abstract
The conventional transport of particles in the on-shell quasiparticle limit is extended to particles of finite life time by means of a spectral function A(X,\vec{P},M^2) for a particle moving in an area of complex self-energy \Sigma^{ret}_X = Re \Sigma^{ret}_X -i \Gamma_X/2. Starting from the Kadanoff-Baym equations we derive in first order gradient expansion equations of motion for testparticles with respect to their time evolution in \vec{X}, \vec{P} and M^2. The off-shell propagation is demonstrated for a couple of model cases that simulate hadron-nucleus collisions. In case of nucleus-nucleus collisions the imaginary part of the hadron self-energy \Gamma_X is determined by the local space-time dependent collision rate dynamically. A first application is presented for A + A reactions up to 95 A MeV, where the effects from the off-shell propagation of nucleons are discussed with respect to high energy proton spectra, high energy photon production as well as kaon yields in comparison to the available data from GANIL.
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"abstract": "The conventional transport of particles in the on-shell quasiparticle limit\nis extended to particles of finite life time by means of a spectral function\nA(X,\\vec{P},M^2) for a particle moving in an area of complex self-energy\n\\Sigma^{ret}_X = Re \\Sigma^{ret}_X -i \\Gamma_X/2. Starting from the\nKadanoff-Baym equations we derive in first order gradient expansion equations\nof motion for testparticles with respect to their time evolution in \\vec{X},\n\\vec{P} and M^2. The off-shell propagation is demonstrated for a couple of\nmodel cases that simulate hadron-nucleus collisions. In case of nucleus-nucleus\ncollisions the imaginary part of the hadron self-energy \\Gamma_X is determined\nby the local space-time dependent collision rate dynamically. A first\napplication is presented for A + A reactions up to 95 A MeV, where the effects\nfrom the off-shell propagation of nucleons are discussed with respect to high\nenergy proton spectra, high energy photon production as well as kaon yields in\ncomparison to the available data from GANIL.",
"arxiv_id": "nucl-th/9903070",
"authors": [
"W. Cassing",
"S. Juchem"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(99)00393-0",
"journal_ref": "Nucl.Phys. A665 (2000) 377-400",
"title": "Semiclassical transport of particles with dynamical spectral functions",
"url": "https://arxiv.org/abs/nucl-th/9903070"
},
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