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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| Online-Zugang: | https://arxiv.org/abs/2604.17193 |
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| _version_ | 1866918454451240960 |
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| author | Sun, Peng-Yu Gao, Tian-Le Man, Zi-Long Liu, Xiang |
| author_facet | Sun, Peng-Yu Gao, Tian-Le Man, Zi-Long Liu, Xiang |
| contents | We investigate $2P$-$1F$ mixing in charmonium, focusing on the close-in-mass $χ_{c2}(2P)$ and $χ_{c2}(1F)$ states. The conventional tensor force yields negligible mixing, motivating the inclusion of coupled-channel effects. Our unquenched calculation reveals sizable mixing angles of $7.5^\circ$ and $15.4^\circ$. We predict the corresponding two-photon and two-gluon decay widths as key observables for experimental verification. Additionally, we discuss the production of these two $2P$-$1F$ mixed states of charmonium via $γγ$ fusion. Current data are insufficient to determine the mixing, highlighting the need for precise future measurements to resolve this aspect of charmonium spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_17193 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Proposed mixing between $2P$ and $1F$ wave charmonia Sun, Peng-Yu Gao, Tian-Le Man, Zi-Long Liu, Xiang High Energy Physics - Phenomenology We investigate $2P$-$1F$ mixing in charmonium, focusing on the close-in-mass $χ_{c2}(2P)$ and $χ_{c2}(1F)$ states. The conventional tensor force yields negligible mixing, motivating the inclusion of coupled-channel effects. Our unquenched calculation reveals sizable mixing angles of $7.5^\circ$ and $15.4^\circ$. We predict the corresponding two-photon and two-gluon decay widths as key observables for experimental verification. Additionally, we discuss the production of these two $2P$-$1F$ mixed states of charmonium via $γγ$ fusion. Current data are insufficient to determine the mixing, highlighting the need for precise future measurements to resolve this aspect of charmonium spectroscopy. |
| title | Proposed mixing between $2P$ and $1F$ wave charmonia |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.17193 |