Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 80, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-020-8340-9
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Funding
- NationalNatural Science Foundation of China [11722540]
- Fundamental Research Funds for the Central Universities
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We apply the method of QCD sum rules to study the ssss tetraquark states of JPC=0-+. We construct all the relevant ssss tetraquark currents, and find that there are only two independent ones. We use them to further construct two weakly-correlated mixed currents. One of them leads to reliable QCD sum rule results and the mass is extracted to be 2.51-0.12+0.15 GeV, suggesting that the X(2370) or the X(2500) can be explained as the ssss tetraquark state of JPC=0-+. To verify this interpretation, we propose to further study the pi pi /KK invariant mass spectra of the J/psi -> gamma pi pi eta ' /gamma KKeta ' decays in BESIII to examine whether there exists the f0(980) resonance.
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