https://doi.org/10.1140/epjc/s10052-020-08454-1
Regular Article – Theoretical Physics
Masses of fully heavy tetraquarks 
in an extended relativized quark model
1
Department of Physics, Hunan Normal University, 410081, Changsha, China
2
Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), 410081, Changsha, China
3
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, 410081, Changsha, China
4
School of Physics, Southeast University, 210094, Nanjing, China
5
Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
6
Theoretical Physics Center for Science Facilities (TPCSF), CAS, 100049, Beijing, China
7
School of Physical Sciences, University of Chinese Academy of Sciences, 101408, Beijing, China
Received:
29
June
2020
Accepted:
8
September
2020
Published online:
21
September
2020
Inspired by recent measurement of possible fully charmed tetraquarks in LHCb Collaboration, we investigate the mass spectra of fully heavy tetraquarks in an extended relativized quark model. Our estimations indicate that the broad structure around 6.4 GeV should contain one or more ground states for 
tetraquarks, while the narrow structure near 6.9 GeV can be categorized as the first radial excitation of system. Moreover, with the wave functions of the tetraquarks and mesons, the strong decays of tetraquarks into heavy quarkonium pair are qualitatively discussed, which can be further checked by the LHCb and CMS Collaborations.
© The Author(s) 2020
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