Doubly hidden-charm/bottom QQQQ tetraquark states
School of Physics, Sun Yat-Sen University, Guang Zhou 510275, China
2 School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China
3 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
4 Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China
5 Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
6 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
7 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
8 Center of High Energy Physics, Peking University, Beijing 100871, China
b e-mail: email@example.com
Published online: 3 August 2018
We study the mass spectra for the cccc and bbbb tetraquark states by developing a moment sum rule method. Our results show that the bbbb tetraquarks lie below the threshold of ηb(1S) ηb(1S ). They are probably stable and very narrow. The masses for the doubly hidden-charm states cccc are higher than the spontaneous dissociation thresholds of two charmonium mesons. We suggest to search for such states in the J/Ψ/J/Ψ and Ψc(1S) Ψc(1S) channels.
© The Authors, published by EDP Sciences 2018
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