dorsal/arxiv
View SchemaEffects of N$^{*}$(1440) resonance on subthreshold kaon, antikaon and antiproton production
| Authors | Bao-An Li, Che Ming Ko, Guoqiang Li |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9404028 |
| URL | https://arxiv.org/abs/nucl-th/9404028 |
Abstract
We study the effects of $N^{*}(1440)$ resonance on the production of kaons, antikaons and antiprotons in heavy-ion collisions at subthreshold energies. Using free-space widths for the $\Delta(1232)$ and the $N^{*}(1440)$ resonance and free-space thresholds for particle production, it is found that the $N^{*}$-baryon interactions contribute about 10\%, 25\% and 80\% to the yield of kaon, antikaon and antiproton, respectively. Doubling the widths of resonances due to possible medium effects, both the total and the $N^{*}$ induced antiproton yield decrease by about a factor of 3. Using a reduced antiproton production threshold in a nuclear medium as a result of dropping in-medium nucleon and antiproton masses, the total and the $N^{*}$ induced antiproton yield increase by a factor of 35 and 27, respectively, and the contribution of the $N^{*}$ induced collisions is reduced to about 50\% of the total.
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"abstract": "We study the effects of $N^{*}(1440)$ resonance on the production of kaons,\nantikaons and antiprotons in heavy-ion collisions at subthreshold energies.\nUsing free-space widths for the $\\Delta(1232)$ and the $N^{*}(1440)$ resonance\nand free-space thresholds for particle production, it is found that the\n$N^{*}$-baryon interactions contribute about 10\\%, 25\\% and 80\\% to the yield\nof kaon, antikaon and antiproton, respectively. Doubling the widths of\nresonances due to possible medium effects, both the total and the $N^{*}$\ninduced antiproton yield decrease by about a factor of 3. Using a reduced\nantiproton production threshold in a nuclear medium as a result of dropping\nin-medium nucleon and antiproton masses, the total and the $N^{*}$ induced\nantiproton yield increase by a factor of 35 and 27, respectively, and the\ncontribution of the $N^{*}$ induced collisions is reduced to about 50\\% of the\ntotal.",
"arxiv_id": "nucl-th/9404028",
"authors": [
"Bao-An Li",
"Che Ming Ko",
"Guoqiang Li"
],
"categories": [
"nucl-th"
],
"title": "Effects of N$^{*}$(1440) resonance on subthreshold kaon, antikaon and antiproton production",
"url": "https://arxiv.org/abs/nucl-th/9404028"
},
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"variant": "snapshot-2026-03-01",
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