dorsal/arxiv
View SchemaTransport Dynamics of Broad Resonances
| Authors | Jörn Knoll, GSI, Darmstadt |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9811099 |
| URL | https://arxiv.org/abs/nucl-th/9811099 |
| DOI | 10.1016/S0146-6410(99)00072-1 |
| Journal | Prog.Part.Nucl.Phys. 42 (1999) 177-186 |
Abstract
The propagation of short life time particles with consequently broad mass width are discussed in the context of transport descriptions. In the first part some known properties of finite life time particles such as resonances are reviewed and discussed at the example of the $\rho$-meson. Grave deficiencies in some of the transport treatment of broad resonances are disclosed and quantified. The second part addresses the derivation of transport equations which permit to account for the damping width of the particles. Baym's $\Phi$-derivable method is used to derive a self-consistent and conserving scheme, which fulfils detailed balance relations even in the case of particles with broad mass distributions. For this scheme a conserved energy-momentum tensor can be constructed. Furthermore, a kinetic entropy can be derived which besides the standard quasi-particle part also includes contributions from fluctuations.
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"abstract": "The propagation of short life time particles with consequently broad mass\nwidth are discussed in the context of transport descriptions. In the first part\nsome known properties of finite life time particles such as resonances are\nreviewed and discussed at the example of the $\\rho$-meson. Grave deficiencies\nin some of the transport treatment of broad resonances are disclosed and\nquantified. The second part addresses the derivation of transport equations\nwhich permit to account for the damping width of the particles. Baym\u0027s\n$\\Phi$-derivable method is used to derive a self-consistent and conserving\nscheme, which fulfils detailed balance relations even in the case of particles\nwith broad mass distributions. For this scheme a conserved energy-momentum\ntensor can be constructed. Furthermore, a kinetic entropy can be derived which\nbesides the standard quasi-particle part also includes contributions from\nfluctuations.",
"arxiv_id": "nucl-th/9811099",
"authors": [
"J\u00f6rn Knoll",
"GSI",
"Darmstadt"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0146-6410(99)00072-1",
"journal_ref": "Prog.Part.Nucl.Phys. 42 (1999) 177-186",
"title": "Transport Dynamics of Broad Resonances",
"url": "https://arxiv.org/abs/nucl-th/9811099"
},
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