1. Hunting for states in the recent LHCb di-J/ψ invariant mass spectrum.
- Author
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Ze-Rui Liang, Xiao-Yi Wu, and De-Liang Yao
- Subjects
- *
MASS spectrometry , *QUANTUM numbers , *RESONANT states , *WAVE analysis , *PSEUDOPOTENTIAL method - Abstract
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]
- Published
- 2021
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