Compositeness of near-threshold states in charged hadronic systems
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914509201866752 |
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| author | Kinugawa, Tomon Hyodo, Tetsuo |
| author_facet | Kinugawa, Tomon Hyodo, Tetsuo |
| contents | We quantify the internal structure of near-threshold bound, virtual, and resonance states in systems where Coulomb and short-range interactions coexist by evaluating the compositeness. Using the Coulomb-modified effective range expansion, we derive an expression for the compositeness in terms of the eigenenergy and Coulomb effective range in the weak-binding limit. We then apply the formulation to several near-threshold states in hadronic and nuclear systems, including $pp$, $αα$, $Ω^{-}Ω^{-}$, $Ω_{ccc}^{++}Ω_{ccc}^{++}$, $Ξ^{-}α$, and $Ω^{-}p$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_22250 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Compositeness of near-threshold states in charged hadronic systems Kinugawa, Tomon Hyodo, Tetsuo High Energy Physics - Phenomenology Nuclear Theory We quantify the internal structure of near-threshold bound, virtual, and resonance states in systems where Coulomb and short-range interactions coexist by evaluating the compositeness. Using the Coulomb-modified effective range expansion, we derive an expression for the compositeness in terms of the eigenenergy and Coulomb effective range in the weak-binding limit. We then apply the formulation to several near-threshold states in hadronic and nuclear systems, including $pp$, $αα$, $Ω^{-}Ω^{-}$, $Ω_{ccc}^{++}Ω_{ccc}^{++}$, $Ξ^{-}α$, and $Ω^{-}p$. |
| title | Compositeness of near-threshold states in charged hadronic systems |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2604.22250 |