Medium modifications of $1P$-wave charmonia $χ_{cJ}(1P)$ in cold nuclear matter
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arXiv
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| Natura: | Preprint |
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2025
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| _version_ | 1866910005805973504 |
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| author | Zhang, Ze-Hua Liu, Xiang |
| author_facet | Zhang, Ze-Hua Liu, Xiang |
| contents | In this work, we employ the quark-meson coupling model to investigate the mass shifts of $1P$-wave charmonia $χ_{cJ}(1P)$ ($J=0,1,2$) in cold symmetric nuclear matter by incorporating in-medium loop contributions to the $χ_{cJ}(1P)$ self-energy within the unquenched picture. At normal nuclear matter density, we obtain significant mass reductions of about 60 MeV for the $χ_{cJ}(1P)$ states, with the $χ_{c2}(1P)$ mass shift primarily arising from the vector-vector loop. Our results also indicate the absence of level crossing between the in-medium $χ_{cJ}(1P)$ mass and the $D\bar{D}$ mass threshold up to $ρ_B < 3ρ_0$-a feature that could be probed in the Compressed Baryonic Matter experiment at FAIR and the Beam Energy Scan program at RHIC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_10200 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Medium modifications of $1P$-wave charmonia $χ_{cJ}(1P)$ in cold nuclear matter Zhang, Ze-Hua Liu, Xiang High Energy Physics - Phenomenology Nuclear Theory In this work, we employ the quark-meson coupling model to investigate the mass shifts of $1P$-wave charmonia $χ_{cJ}(1P)$ ($J=0,1,2$) in cold symmetric nuclear matter by incorporating in-medium loop contributions to the $χ_{cJ}(1P)$ self-energy within the unquenched picture. At normal nuclear matter density, we obtain significant mass reductions of about 60 MeV for the $χ_{cJ}(1P)$ states, with the $χ_{c2}(1P)$ mass shift primarily arising from the vector-vector loop. Our results also indicate the absence of level crossing between the in-medium $χ_{cJ}(1P)$ mass and the $D\bar{D}$ mass threshold up to $ρ_B < 3ρ_0$-a feature that could be probed in the Compressed Baryonic Matter experiment at FAIR and the Beam Energy Scan program at RHIC. |
| title | Medium modifications of $1P$-wave charmonia $χ_{cJ}(1P)$ in cold nuclear matter |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2510.10200 |