dorsal/arxiv
View SchemaPhi Meson Production in Heavy-Ion Collisions at SIS Energies
| Authors | W. S. Chung, G. Q. Li, C. M. Ko |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9704002 |
| URL | https://arxiv.org/abs/nucl-th/9704002 |
| DOI | 10.1016/S0375-9474(97)00198-X |
| Journal | Nucl.Phys. A625 (1997) 347-371 |
Abstract
Phi meson production in heavy-ion collisions at SIS/GSI energies ($\sim 2$ GeV/nucleon) is studied in the relativistic transport model. We include contributions from baryon-baryon, pion-baryon, and kaon-antikaon collisions. The cross sections for the first two processes are obtained in an one-boson-exchange model, while that for the last process is taken to be of Breit-Wigner form through the phi meson resonance. The dominant contribution to phi meson production in heavy ion collisions at these energies is found to come from secondary pion-nucleon collisions. Effects due to medium modifications of kaon masses are also studied and are found to reduce the phi meson yield by about a factor of two, mainly because of increased phi decay width as a result of dropping kaon-antikaon masses. In this case, the $\phi/K^-$ ratio is about 4%, which is a factor of 2-3 below preliminary experimental data from the FOPI collaboration at GSI. Including also the reduction of phi meson mass in medium increases this ratio to about 8%, which is then in reasonable agreement with the data.
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"abstract": "Phi meson production in heavy-ion collisions at SIS/GSI energies ($\\sim 2$\nGeV/nucleon) is studied in the relativistic transport model. We include\ncontributions from baryon-baryon, pion-baryon, and kaon-antikaon collisions.\nThe cross sections for the first two processes are obtained in an\none-boson-exchange model, while that for the last process is taken to be of\nBreit-Wigner form through the phi meson resonance. The dominant contribution to\nphi meson production in heavy ion collisions at these energies is found to come\nfrom secondary pion-nucleon collisions. Effects due to medium modifications of\nkaon masses are also studied and are found to reduce the phi meson yield by\nabout a factor of two, mainly because of increased phi decay width as a result\nof dropping kaon-antikaon masses. In this case, the $\\phi/K^-$ ratio is about\n4%, which is a factor of 2-3 below preliminary experimental data from the FOPI\ncollaboration at GSI. Including also the reduction of phi meson mass in medium\nincreases this ratio to about 8%, which is then in reasonable agreement with\nthe data.",
"arxiv_id": "nucl-th/9704002",
"authors": [
"W. S. Chung",
"G. Q. Li",
"C. M. Ko"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(97)00198-X",
"journal_ref": "Nucl.Phys. A625 (1997) 347-371",
"title": "Phi Meson Production in Heavy-Ion Collisions at SIS Energies",
"url": "https://arxiv.org/abs/nucl-th/9704002"
},
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