https://doi.org/10.1140/epjc/s10052-023-11527-6
Regular Article - Theoretical Physics
On the nature of X(3960)
1
Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 100871, Beijing, China
2
Department of Physics, National Taiwan University, 10617, Taipei, Taiwan, ROC
3
College of Physics, Sichuan University, 610065, Chengdu, Sichuan, China
Received:
5
April
2023
Accepted:
18
April
2023
Published online:
9
May
2023
A near-threshold enhancement in the 
system, dubbed as X(3960), is observed by the LHCb collaboration recently. A combined analysis on 
, 
, and 
is performed using both a K-matrix approach of 
four-point contact interactions and a model of Flatté-like parameterizations. The use of the pole counting rule and spectral density function sum rule indicate, under current statistics, that this near-threshold state has probably the mixed nature of a 
confining state and continuum.
© The Author(s) 2023
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