dorsal/arxiv
View SchemaNon-perturbative finite $T$ broadening of the $\rho$ meson and dilepton emission in heavy ion-collisions
| Authors | Jörg Ruppert, Thorsten Renk |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0412047 |
| URL | https://arxiv.org/abs/nucl-th/0412047 |
| DOI | 10.1103/PhysRevC.71.064903 10.1103/PhysRevC.75.059901 |
| Journal | Phys.Rev.C71:064903,2005; Erratum-ibid.C75:059901,2007 |
Abstract
We study self-consistently the finite $T$ broadening of the $\rho$-meson and its implications for dilepton emission in heavy ion-collisions. For this purpose finite width effects at finite temperature due to the $\rho$-$\pi$ interaction are investigated in a self-consistent $\Phi$-functional approach. The temperature dependence of the $\rho$-meson and pion spectral functions and self-energies is discussed. The spectral functions show considerable broadening in comparison with a perturbative calculation on the one-loop level. Using these spectral functions, we make a comparison to dilepton emission data from the CERES NA49 collaboration employing a parametrized fireball evolution model of collision. We demonstrate that these non-perturbative finite width effects are in-medium modifications relevant to the understanding of the enhancement of the low invariant mass spectrum of dileptons emitted in A-A collisions.
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"abstract": "We study self-consistently the finite $T$ broadening of the $\\rho$-meson and\nits implications for dilepton emission in heavy ion-collisions. For this\npurpose finite width effects at finite temperature due to the $\\rho$-$\\pi$\ninteraction are investigated in a self-consistent $\\Phi$-functional approach.\nThe temperature dependence of the $\\rho$-meson and pion spectral functions and\nself-energies is discussed. The spectral functions show considerable broadening\nin comparison with a perturbative calculation on the one-loop level. Using\nthese spectral functions, we make a comparison to dilepton emission data from\nthe CERES NA49 collaboration employing a parametrized fireball evolution model\nof collision. We demonstrate that these non-perturbative finite width effects\nare in-medium modifications relevant to the understanding of the enhancement of\nthe low invariant mass spectrum of dileptons emitted in A-A collisions.",
"arxiv_id": "nucl-th/0412047",
"authors": [
"J\u00f6rg Ruppert",
"Thorsten Renk"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.71.064903 10.1103/PhysRevC.75.059901",
"journal_ref": "Phys.Rev.C71:064903,2005; Erratum-ibid.C75:059901,2007",
"title": "Non-perturbative finite $T$ broadening of the $\\rho$ meson and dilepton emission in heavy ion-collisions",
"url": "https://arxiv.org/abs/nucl-th/0412047"
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