https://doi.org/10.1140/epjc/s10052-021-09603-w
Regular Article - Theoretical Physics
as a 
molecule
1
Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 100871, Beijing, China
2
Department of Engineering Physics, Tsinghua University, 100084, Beijing, China
3
College of Physics, Sichuan University, 610065, Chengdu, Sichuan, China
Received:
5
August
2021
Accepted:
28
August
2021
Published online:
14
September
2021
The analyses of the LHCb data on X(2900) in the 
spectrum are performed. Both dynamically generated and explicitly introduced are considered. The results show that both these two approaches support the interpretation of as a molecular state, with 
and an iso-singlet interpretation is much more favorable. The effect of triangle singularity on the production of is also discussed, and it is found that it cannot be interpreted as a pure triangle cusp.
© The Author(s) 2021
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