Regular Article - Theoretical Physics
On the nature of X(3960)
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
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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