2015/10/28 by Weijun Deng, Deng, Wei-Jun, Li-Ye Xiao +5 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1510.08269
openalex publication_date 2015/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the electromagnetic (EM) transitions of the nS, nP (n≤ 3), and nD (n≤ 2) charmonium states with a constituent quark model. We obtain a reasonable description of the EM transitions of the well-established charmonium states J/ψ, ψ(2S), χcJ(1P), hc(1P) and ψ(3770). We find that the M2 transitions give notable corrections to some E1 dominant processes by interfering with the E1 transitions. Our predictions of EM decay properties for the higher charmonium states are also presented and compared with other model predictions. In particular, we discuss the EM decay properties of some "XYZ" states, such as X(3823), X(3872), X(3915), X(3940) and X(4350) as conventional charmonium states. Assuming X(3872) as the χc1(2P) state, our predicted ratio Γ[X(3872)→ ψ(2S)γ]/Γ[X(3872)→ J/ψγ]≃ 4.0 is consistent with BaBar's measurement.