The analysis of the LHCb data on X(6900)found in the di-J/ψsystem was performed using a momentum-dependent Flatté-like parameterization.The use of the pole counting rule and spectral density function sum rule pr...The analysis of the LHCb data on X(6900)found in the di-J/ψsystem was performed using a momentum-dependent Flatté-like parameterization.The use of the pole counting rule and spectral density function sum rule provides consistent evidence that both confining and molecular states are possible.Alternatively,the nature of X(6900)cannot be distinguished if only the di-J/ψexperimental data with current statistics are available.Nevertheless,we found that the lowest state in the di-J/ψsystem likely has the same quantum numbers as X(6900),and X(6900)is probably not interpreted as a J/ψ-ψ(2 S)molecular state.展开更多
基金Supported in part by National Nature Science Foundations of China(11975028,10925522)China Postdoctoral Science Foundation(2020M680500)。
文摘The analysis of the LHCb data on X(6900)found in the di-J/ψsystem was performed using a momentum-dependent Flatté-like parameterization.The use of the pole counting rule and spectral density function sum rule provides consistent evidence that both confining and molecular states are possible.Alternatively,the nature of X(6900)cannot be distinguished if only the di-J/ψexperimental data with current statistics are available.Nevertheless,we found that the lowest state in the di-J/ψsystem likely has the same quantum numbers as X(6900),and X(6900)is probably not interpreted as a J/ψ-ψ(2 S)molecular state.
