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Possible ${\bar{D}}^{()} Ξ_{c c}^{()}$ and $Ξ_{c c}^{()} Ξ_{c c}^{()}$ molecules as superflavor partners of $T_{c c}$

Manato Sakai ^*

Yasuhiro Yamaguchi ^†

Department of Physics, Nagoya University, Nagoya 464-8602, Japan and Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan

Department of Physics, Nagoya University, Nagoya 464-8602, Japan; Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan; and Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan

^*Contact author: msakai@hken.phys.nagoya-u.ac.jp
^†Contact author: yamaguchi@hken.phys.nagoya-u.ac.jp

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Phys. Rev. D 114, 014053 – Published 24 July, 2026

DOI: https://doi.org/10.1103/wqsq-rft1

Abstract

The doubly charmed tetraquark $T_{c c}$ was reported by the LHCb experiment in 2022 and a lot of theoretical studies have been conducted. The small binding energy measured from the $D^{* +} D^{0}$ threshold indicates that $T_{c c}$ is a $D D^{*}$ 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 $T_{c c}$ . By replacing ${\bar{D}}^{(*)}$ with $Ξ_{c c}^{(*)}$ within this symmetry, ${\bar{D}}^{(*)} Ξ_{c c}^{(*)}$ and $Ξ_{c c}^{(*)} Ξ_{c c}^{(*)}$ are expected to form partner structures of $T_{c c}$ . In this paper, we investigate bound and resonant states of ${\bar{D}}^{(*)} Ξ_{c c}^{(*)}$ and $Ξ_{c c}^{(*)} Ξ_{c c}^{(*)}$ 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 ${\bar{D}}^{(*)} Ξ_{c c}^{(*)}$ and $Ξ_{c c}^{(*)} Ξ_{c c}^{(*)}$ are taken to be the same as those for $T_{c c}$ 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.

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Phys. Rev. D 114, 014053– Published 24 July, 2026

Vol. 114, Iss. 1 — 1 July 2026

Received 22 March 2026
Accepted 12 June 2026

DOI: https://doi.org/10.1103/wqsq-rft1

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Possible ${\bar{D}}^{()} Ξ_{c c}^{()}$ and $Ξ_{c c}^{()} Ξ_{c c}^{()}$ molecules as superflavor partners of $T_{c c}$

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Possible D¯(*)Ξcc(*) and Ξcc(*)Ξcc(*) molecules as superflavor partners of Tcc

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Possible ${\bar{D}}^{()} Ξ_{c c}^{()}$ and $Ξ_{c c}^{()} Ξ_{c c}^{()}$ molecules as superflavor partners of $T_{c c}$