Production of nuclei and hypernuclei in pion-induced reactions near threshold energies
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arXiv
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| Format: | Preprint |
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2023
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| author | Kittiratpattana, Apiwit Reichert, Tom Buyukcizmeci, Nihal Botvina, Alexander Limphirat, Ayut Herold, Christoph Steinheimer, Jan Bleicher, Marcus |
| author_facet | Kittiratpattana, Apiwit Reichert, Tom Buyukcizmeci, Nihal Botvina, Alexander Limphirat, Ayut Herold, Christoph Steinheimer, Jan Bleicher, Marcus |
| contents | The Ultra-relativistic Quantum Molecular Dynamics model is employed to simulate $π^-+\mathrm{C}$ and $π^-+\mathrm{W}$ collisions at p$_\mathrm{lab}=1.7$ GeV motivated by the recent HADES results. By comparing the proton and $Λ$ transverse momentum spectra, it was observed that the data and transport model calculation show a good agreement, if cluster formation is included to obtain the free proton spectra. Predictions of light cluster ($d$, $t$, $^3$He, $^4$He, as well as ${}^{3}_Λ$H and $Ξ$N) multiplicities and spectra are made using a coalescence mechanism. The resulting multiplicities suggest that the pion beam experiment can produce a substantial amount of ${}^{3}_Λ$H, especially in $π^-+\mathrm{W}$ collisions due to the stopping of the $Λ$ inside the large tungsten nucleus. The findings are supplemented by a statistical multi-fragmentation analysis suggesting that even larger hyper-fragments are produced copiously. It is suggested that even double strange hypernuclei are in reach and might be studied in more detail using a slightly higher pion beam momentum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_09208 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Production of nuclei and hypernuclei in pion-induced reactions near threshold energies Kittiratpattana, Apiwit Reichert, Tom Buyukcizmeci, Nihal Botvina, Alexander Limphirat, Ayut Herold, Christoph Steinheimer, Jan Bleicher, Marcus Nuclear Theory High Energy Physics - Phenomenology The Ultra-relativistic Quantum Molecular Dynamics model is employed to simulate $π^-+\mathrm{C}$ and $π^-+\mathrm{W}$ collisions at p$_\mathrm{lab}=1.7$ GeV motivated by the recent HADES results. By comparing the proton and $Λ$ transverse momentum spectra, it was observed that the data and transport model calculation show a good agreement, if cluster formation is included to obtain the free proton spectra. Predictions of light cluster ($d$, $t$, $^3$He, $^4$He, as well as ${}^{3}_Λ$H and $Ξ$N) multiplicities and spectra are made using a coalescence mechanism. The resulting multiplicities suggest that the pion beam experiment can produce a substantial amount of ${}^{3}_Λ$H, especially in $π^-+\mathrm{W}$ collisions due to the stopping of the $Λ$ inside the large tungsten nucleus. The findings are supplemented by a statistical multi-fragmentation analysis suggesting that even larger hyper-fragments are produced copiously. It is suggested that even double strange hypernuclei are in reach and might be studied in more detail using a slightly higher pion beam momentum. |
| title | Production of nuclei and hypernuclei in pion-induced reactions near threshold energies |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2305.09208 |