Probing small neutron skin variations in isotope pairs by hyperon-antihyperon production in antiproton--nucleus interactions
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915299339534336 |
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| author | Schupp, Falk Pochodzalla, Josef Bölting, Michael Christiansen, Martin Gaitanos, Theodoros Lenske, Horst Steinen, Marcell |
| author_facet | Schupp, Falk Pochodzalla, Josef Bölting, Michael Christiansen, Martin Gaitanos, Theodoros Lenske, Horst Steinen, Marcell |
| contents | We propose a new method to study the evolution of the neutron periphery between different isotopes by considering antiproton--nucleus interactions close to the production threshold of $Λ\overline{Λ}$ and $Σ^-\overline{Λ}$ pairs. At low energies, $Λ\overline{Λ}$ pairs are produced in $\overline{\text{p}} +\text{p}$ collisions, while $Σ^-\overline{Λ}$ pairs can only be produced in $\overline{\text{p}} +\text{n}$ interactions. Within a simple geometrical picture we show that the double ratio for the production of $Σ^-\overline{Λ}$ and $Λ\overline{Λ}$ pairs for two different isotopes are related to the variation of the neutron skin thickness between the two nuclei. Performing high statistics calculations with the Gießen Boltzmann--Uehling--Uhlenbeck (GiBUU) transport model for several isotope pairs covering a wide range of elements we verify a strong correlation between the double ratio from the full transport simulations and the schematic model. This correlation enables us to quantify the potential of the proposed method for precise studies of neutron skin variations in isotope chains. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_13622 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Probing small neutron skin variations in isotope pairs by hyperon-antihyperon production in antiproton--nucleus interactions Schupp, Falk Pochodzalla, Josef Bölting, Michael Christiansen, Martin Gaitanos, Theodoros Lenske, Horst Steinen, Marcell Nuclear Theory Nuclear Experiment We propose a new method to study the evolution of the neutron periphery between different isotopes by considering antiproton--nucleus interactions close to the production threshold of $Λ\overline{Λ}$ and $Σ^-\overline{Λ}$ pairs. At low energies, $Λ\overline{Λ}$ pairs are produced in $\overline{\text{p}} +\text{p}$ collisions, while $Σ^-\overline{Λ}$ pairs can only be produced in $\overline{\text{p}} +\text{n}$ interactions. Within a simple geometrical picture we show that the double ratio for the production of $Σ^-\overline{Λ}$ and $Λ\overline{Λ}$ pairs for two different isotopes are related to the variation of the neutron skin thickness between the two nuclei. Performing high statistics calculations with the Gießen Boltzmann--Uehling--Uhlenbeck (GiBUU) transport model for several isotope pairs covering a wide range of elements we verify a strong correlation between the double ratio from the full transport simulations and the schematic model. This correlation enables us to quantify the potential of the proposed method for precise studies of neutron skin variations in isotope chains. |
| title | Probing small neutron skin variations in isotope pairs by hyperon-antihyperon production in antiproton--nucleus interactions |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2411.13622 |