Deciphering $Ξ^-$ capture events in light emulsion nuclei
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866914680803426304 |
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| author | Friedman, Eliahu Gal, Avraham |
| author_facet | Friedman, Eliahu Gal, Avraham |
| contents | We recently showed that all five KEK and J-PARC uniquely assigned two-body $Ξ^-$+${^A}$Z$\to{_Λ^{A'}}$Z'+${_Λ^{A''}}$Z'' capture events in CNO light emulsion nuclei are consistent with Coulomb-assisted $1p_{Ξ^-}$ nuclear states in a $Ξ$-nuclear potential of nuclear-matter depth $V_Ξ\gtrsim 20$ MeV [1]. Here we argue that the recently reported $^{14}$N capture events named KINKA and IRRAWADDY are more likely $1p_{Ξ^0}$--$^{14}$C nuclear states [2] than $1s_{Ξ^-}$--$^{14}$N states, the latter assignment implying considerably smaller values of $V_Ξ$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_12041 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Deciphering $Ξ^-$ capture events in light emulsion nuclei Friedman, Eliahu Gal, Avraham Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment We recently showed that all five KEK and J-PARC uniquely assigned two-body $Ξ^-$+${^A}$Z$\to{_Λ^{A'}}$Z'+${_Λ^{A''}}$Z'' capture events in CNO light emulsion nuclei are consistent with Coulomb-assisted $1p_{Ξ^-}$ nuclear states in a $Ξ$-nuclear potential of nuclear-matter depth $V_Ξ\gtrsim 20$ MeV [1]. Here we argue that the recently reported $^{14}$N capture events named KINKA and IRRAWADDY are more likely $1p_{Ξ^0}$--$^{14}$C nuclear states [2] than $1s_{Ξ^-}$--$^{14}$N states, the latter assignment implying considerably smaller values of $V_Ξ$. |
| title | Deciphering $Ξ^-$ capture events in light emulsion nuclei |
| topic | Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2308.12041 |