dorsal/arxiv
View SchemaRho Meson Broadening in Hot and Dense Hadronic Matter
| Authors | Song Gao, Charles Gale, Christoph Ernst, Horst Stöcker, Walter Greiner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9812059 |
| URL | https://arxiv.org/abs/nucl-th/9812059 |
Abstract
The modification of the width of rho mesons due to in-medium decays and collisions is evaluated. The decay width is calculated from the imaginary part of the one-loop self-energy at finite temperature. The collision width is related to the cross sections of the $\rho$ + pion and the $\rho$ + nucleon reactions. A calculation based on an effective Lagrangian shows the importance of including the direct $\rho\pi\to\rho\pi$ scattering which is dominated by the $a_1$ exchange. A large broadening of the spectral function is found, accompanied by a strength suppression at the pole.
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"date_created": "2026-03-02T18:00:24.588000Z",
"date_modified": "2026-03-02T18:00:24.588000Z",
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"abstract": "The modification of the width of rho mesons due to in-medium decays and\ncollisions is evaluated. The decay width is calculated from the imaginary part\nof the one-loop self-energy at finite temperature. The collision width is\nrelated to the cross sections of the $\\rho$ + pion and the $\\rho$ + nucleon\nreactions. A calculation based on an effective Lagrangian shows the importance\nof including the direct $\\rho\\pi\\to\\rho\\pi$ scattering which is dominated by\nthe $a_1$ exchange. A large broadening of the spectral function is found,\naccompanied by a strength suppression at the pole.",
"arxiv_id": "nucl-th/9812059",
"authors": [
"Song Gao",
"Charles Gale",
"Christoph Ernst",
"Horst St\u00f6cker",
"Walter Greiner"
],
"categories": [
"nucl-th",
"hep-ph"
],
"title": "Rho Meson Broadening in Hot and Dense Hadronic Matter",
"url": "https://arxiv.org/abs/nucl-th/9812059"
},
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"type": "Model",
"variant": "snapshot-2026-03-01",
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