Search

Partial wave analysis is performed, with effective potentials as dynamical inputs, to scrutinize the recent LHCb data on the di-J/ψ invariant mass spectrum. Coupled-channel effects are incorporated in the production amplitude via final state interactions. The LHCb data can be well described. A dynamically generated pole structure, which can be identified as the X(6900) state, is found. Our analysis also provides hints for the existence of three other possible states: a bound state X(6200), a broad resonant state X(6680) and a narrow resonant state X(7200). The JPC quantum numbers of the X(6680) and X(6900) states should be 2++, while the X(6200) and X(7200) states prefer 0++. To determine the above states more precisely, more experimental data for the channels, such as J/ψψ(2S), J/ψψ(3770), di-ψ(2S), are required. [ABSTRACT FROM AUTHOR]