dorsal/arxiv
View SchemaProbing the density dependence of the symmetry potential in intermediate energy heavy ion collisions
| Authors | Q. Li, Z. X. Li, S. Soff, Raj K. Gupta, M. Bleicher, H. Stoecker |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0507068 |
| URL | https://arxiv.org/abs/nucl-th/0507068 |
| DOI | 10.1088/0954-3899/31/11/016 |
| Journal | J.Phys. G31 (2005) 1359-1374 |
Abstract
Based on the ultrarelativistic quantum molecular dynamics (UrQMD) model, the effects of the density-dependent symmetry potential for baryons and of the Coulomb potential for produced mesons are investigated for neutron-rich heavy ion collisions at intermediate energies. The calculated results of the $\Delta^-/\Delta^{++}$ and $\pi ^{-}/\pi ^{+}$ production ratios show a clear beam-energy dependence on the density-dependent symmetry potential, which is stronger for the $\pi ^{-}/\pi ^{+}$ ratio close to the pion production threshold. The Coulomb potential of the mesons changes the transverse momentum distribution of the $\pi ^{-}/\pi ^{+}$ ratio significantly, though it alters only slightly the $\pi^-$ and $\pi^+$ total yields. The $\pi^-$ yields, especially at midrapidity or at low transverse momenta and the $\pi^-/\pi^+$ ratios at low transverse momenta, are shown to be sensitive probes of the density-dependent symmetry potential in dense nuclear matter. The effect of the density-dependent symmetry potential on the production of both, K$^0$ and K$^+$ mesons, is also investigated.
{
"annotation_id": "3a760ec8-9a2f-4073-a5a7-86577d6ee544",
"date_created": "2026-03-02T18:00:05.045000Z",
"date_modified": "2026-03-02T18:00:05.045000Z",
"file_hash": "1233b0884c2ae9059d204dd0a8820d21545a83caa5f87b3486f6a79333397913",
"private": false,
"record": {
"abstract": "Based on the ultrarelativistic quantum molecular dynamics (UrQMD) model, the\neffects of the density-dependent symmetry potential for baryons and of the\nCoulomb potential for produced mesons are investigated for neutron-rich heavy\nion collisions at intermediate energies. The calculated results of the\n$\\Delta^-/\\Delta^{++}$ and $\\pi ^{-}/\\pi ^{+}$ production ratios show a clear\nbeam-energy dependence on the density-dependent symmetry potential, which is\nstronger for the $\\pi ^{-}/\\pi ^{+}$ ratio close to the pion production\nthreshold. The Coulomb potential of the mesons changes the transverse momentum\ndistribution of the $\\pi ^{-}/\\pi ^{+}$ ratio significantly, though it alters\nonly slightly the $\\pi^-$ and $\\pi^+$ total yields. The $\\pi^-$ yields,\nespecially at midrapidity or at low transverse momenta and the $\\pi^-/\\pi^+$\nratios at low transverse momenta, are shown to be sensitive probes of the\ndensity-dependent symmetry potential in dense nuclear matter. The effect of the\ndensity-dependent symmetry potential on the production of both, K$^0$ and K$^+$\nmesons, is also investigated.",
"arxiv_id": "nucl-th/0507068",
"authors": [
"Q. Li",
"Z. X. Li",
"S. Soff",
"Raj K. Gupta",
"M. Bleicher",
"H. Stoecker"
],
"categories": [
"nucl-th"
],
"doi": "10.1088/0954-3899/31/11/016",
"journal_ref": "J.Phys. G31 (2005) 1359-1374",
"title": "Probing the density dependence of the symmetry potential in intermediate energy heavy ion collisions",
"url": "https://arxiv.org/abs/nucl-th/0507068"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "fdad6eeb-be3f-4556-9a2f-23dfdfdff0be",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}