2025/12/11 by Zhi-Wei Liu, Liu, Zhi-Wei, Xie, Jia-Ming +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2512.10459
openalex publication_date 2025/12/11 · openalex created_date 2025/12/13 · openalex updated_date 2026/07/28
Recent re-analyses of the di-J/Ψ invariant mass spectra reveal a state near the di-J/Ψ threshold, referred to as the X(6200). Yet the nature of this near-threshold pole--whether it is a resonant, bound, or virtual state--remains unresolved due to our limited understanding of the di-J/Ψ interaction. To address this question, we predict the di-J/Ψ and J/ΨΨ(2S) femtoscopic correlation functions based on the Koonin-Pratt formula with a Gaussian source and the coupled-channel dynamics. Our results show that the di-J/Ψ correlation function exhibits distinctly different behaviors in each scenario, especially for small source sizes (R∼1 fm), providing a clear experimental observable to distinguish the nature of X(6200). These distinguishing features persist even when quantum statistical effects and coupled-channel dynamics are included and show negligible sensitivity to off-shell ambiguities. Given the high J/Ψ production rates and clean detection channels at the LHC, we hope that these discoveries will stimulate further experimental studies and help clarify the nature of double-vector-charmonium interactions and the nonperturbative dynamics of fully-heavy tetraquark systems.