Coupled-channel analysis for vector charmonia and their nature

2025/09/16 by Nakamura, Satoshi X.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2509.12925

Abstract

High-precision e⁺e^-→ cc data (20 final states) from the BESIII and Belle in √(s)=3.75-4.7 GeV are analyzed with a semi three-body unitary coupled-channel model. Vector charmonium poles are extracted from the amplitudes obtained from the fit. We find well-known ψ states listed in the PDG, and also several states near open-charm thresholds. The compositeness of the near-threshold poles suggests that ψ(4040) could mainly consist of a D^*D^*-molecule component, rather than a conventionally accepted quark-model ψ(3S) state. Also, ψ(4230) and ψ(4360) might be substantial mixtures of D₁(2420)D, D₁(2420)D^*, D_s^*D_s^*, and cc components.

Citations

• Global coupled-channel analysis of e⁺e^-→ cc processes in √(s)=3.75-4.7 GeV

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