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Study of the ΩcccΩccc and ΩbbbΩbbb dibaryons in QCD sum rules

Xu-Liang Chen1, Jin-Peng Zhang1, Zi-Xi Ou-Yang2, Wei Chen1,3,*, and Jia-Jun Wu2,3,†

  • *Contact author: chenwei29@mail.sysu.edu.cn
  • †Contact author: wujiajun@ucas.ac.cn
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Phys. Rev. D 113, 114015 – Published 8 June, 2026

DOI: https://doi.org/10.1103/gs4y-n7lw

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 ΩcccΩccc and ΩbbbΩbbb dibaryons in both the S01 and S25 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 the MS¯ scheme, the mass of the scalar ΩcccΩccc dibaryon is found to be slightly above the 2Ωccc mass threshold, while the ΩbbbΩbbb systems may form bound states. However, they are predicted to be much heavier in the on-shell scheme.

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Phys. Rev. D 113, 114015– Published 8 June, 2026
  • Received 28 February 2026
  • Accepted 13 May 2026
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