Possible $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ molecules as superflavor partners of $T_{cc}$
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2026
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| _version_ | 1866910051624550400 |
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| author | Sakai, Manato Yamaguchi, Yasuhiro |
| author_facet | Sakai, Manato Yamaguchi, Yasuhiro |
| contents | The doubly charmed tetraquark $T_{cc}$ has been reported by the LHCb experiment in 2022, and a lot of theoretical studies has been conducted. The small binding energy measured from $D^{\ast + }D^0$ threshold indicates that $T_{cc}$ is a $DD^\ast$ molecule. On the other hand, the superflavor symmetry, which relates heavy antiquarks to heavy diquarks, provides a useful framework for predicting the existence of partner exotic hadrons associated with $T_{cc}$. By replacing $\bar{D}^{(*)}$ with $Ξ_{cc}^{(*)}$ within this symmetry, $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ are expected to form partner structures of $T_{cc}$. In this paper, we investigate bound and resonant states of $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ based on the one boson exchange potential, where $π$, $ρ$, $ω$ and $σ$ are considered as bosons. The cutoff parameter and the coupling constants for $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ are taken to be the same as those for $T_{cc}$ due to superflavor symmetry. We also discuss the $σ$ coupling constant, which is uncertain, dependence of these mass spectra. A lot of bound and resonant states with some quantum numbers are obtained for each $σ$ coupling constant, but these mass spectra depend on the $σ$ coupling constant significantly. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_12654 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Possible $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ molecules as superflavor partners of $T_{cc}$ Sakai, Manato Yamaguchi, Yasuhiro High Energy Physics - Phenomenology The doubly charmed tetraquark $T_{cc}$ has been reported by the LHCb experiment in 2022, and a lot of theoretical studies has been conducted. The small binding energy measured from $D^{\ast + }D^0$ threshold indicates that $T_{cc}$ is a $DD^\ast$ molecule. On the other hand, the superflavor symmetry, which relates heavy antiquarks to heavy diquarks, provides a useful framework for predicting the existence of partner exotic hadrons associated with $T_{cc}$. By replacing $\bar{D}^{(*)}$ with $Ξ_{cc}^{(*)}$ within this symmetry, $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ are expected to form partner structures of $T_{cc}$. In this paper, we investigate bound and resonant states of $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ based on the one boson exchange potential, where $π$, $ρ$, $ω$ and $σ$ are considered as bosons. The cutoff parameter and the coupling constants for $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ are taken to be the same as those for $T_{cc}$ due to superflavor symmetry. We also discuss the $σ$ coupling constant, which is uncertain, dependence of these mass spectra. A lot of bound and resonant states with some quantum numbers are obtained for each $σ$ coupling constant, but these mass spectra depend on the $σ$ coupling constant significantly. |
| title | Possible $\bar{D}^{(*)} Ξ_{cc}^{(*)}$ and $Ξ_{cc}^{(*)}Ξ_{cc}^{(*)}$ molecules as superflavor partners of $T_{cc}$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.12654 |