https://doi.org/10.1140/epjc/s10052-022-11111-4
Regular Article - Theoretical Physics
Spectrum of the S-wave fully-heavy tetraquark states
1
School of Physical Science and Technology, Southwest University, 400715, Chongqing, China
2
School of Physics, Southeast University, 211189, Nanjing, China
3
College of Physics and Engineering, Qufu Normal University, 273165, Qufu, China
4
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
5
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, 101408, Beijing, China
6
Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, 730000, Lanzhou, China
c
gli@qfnu.edu.cn
d
ancs@swu.edu.cn
Received:
27
September
2022
Accepted:
5
December
2022
Published online:
13
December
2022
In present work, spectrum of the S-wave fully-heavy tetraquark states 
(
), i.e., 
, 
, 
/
, 
/ 
, 
/
, and 
are systematically investigated within a nonrelativistic constituent quark model, in which the instanton-induced and one-gluon-exchange interactions are taken into account as the residual spin-dependent hyperfine interaction. Our results show that the states with and components could be located around 6500 MeV and 19,200 MeV, respectively. Based on our calculations, the new X(6900) state observed by LHCb may be not a ground tetraquark state, while it could be an orbitally or radially excited state of system. On the other hand, the recently reported X(6600) state by CMS and ATLAS can be explained as a ground tetraquark state with spin-parity 
.
© The Author(s) 2022
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