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arXiv · 2602.21872

Study of the $\Omega_{ccc}\Omega_{ccc}$ and $\Omega_{bbb}\Omega_{bbb}$ dibaryons in QCD Sum Rules

Xu-Liang Chen·Jin-Peng Zhang·Zi-Xi Ou-Yang·Wei Chen·Jia-Jun Wu
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Abstract

The recent observation of a family of fully-charm tetraquark states by the LHCb, ATLAS and CMS Collaborations suggests the possible existence of fully-heavy dibaryons. In this work, we investigate the $\Omega_{ccc}\Omega_{ccc}$ and $\Omega_{bbb}\Omega_{bbb}$ dibaryons in both the $^1S_0$ and $^5S_2$ channels using the method of QCD sum rules. We employ the iterative dispersion relation (IDR) method to efficiently compute the massive five-loop banana diagrams that appear in these systems, and properly address the tricky small-circle divergence problem in the nonperturbative terms. Our analyses reveal that for both charm and bottom systems, the scalar dibaryon lies lower than its tensor counterpart. In $\overline{\text{MS}}$ scheme, the mass of the scalar $\Omega_{ccc}\Omega_{ccc}$ dibaryon is found to be slightly above the $2\Omega_{ccc}$ mass threshold, while the $\Omega_{bbb}\Omega_{bbb}$ systems may form bound states. However, they are predicted to be much heavier in the on-shell scheme.

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Xu-Liang Chen, Jin-Peng Zhang, Zi-Xi Ou-Yang, Wei Chen, Jia-Jun Wu. 2026-02-25. Study of the $\Omega_{ccc}\Omega_{ccc}$ and $\Omega_{bbb}\Omega_{bbb}$ dibaryons in QCD Sum Rules. https://doi.org/10.1103/gs4y-n7lw

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