Abstract
AbstractA near-threshold enhancement in the$$D^{+}_{s}D^{-}_{s}$$Ds+Ds-system, dubbed asX(3960), is observed by the LHCb collaboration recently. A combined analysis on$$\chi _{c0}(3930)~(\rightarrow D^+ D^-)$$χc0(3930)(→D+D-),$$X(3960)~(\rightarrow D^{+}_{s}D^{-}_{s})$$X(3960)(→Ds+Ds-), and$$X(3915)~(\rightarrow J/\psi \omega )$$X(3915)(→J/ψω)is performed using both aK-matrix approach of$$D_{(s)}\bar{D}_{(s)}$$D(s)D¯(s)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$$D^{+}_{s}D^{-}_{s}$$Ds+Ds-near-threshold state has probably the mixed nature of a$$c\bar{c}$$cc¯confining state and$$D^{+}_{s}D^{-}_{s}$$Ds+Ds-continuum.
Funder
National Nature Science Foundations of China
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
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