Charmonium states in a coupled-channel model
arxiv(2024)
摘要
We systematically investigate the mass spectrum and two-body open-charm
strong decays of charmonium states in a coupled-channel model where the ^3P_0
quark-antiquark pair creation mechanism is employed. The results of masses,
mass shifts, proportions of the cc̅ component, and open-charm decay
widths are provided. The S-D wave mixing angles and di-electric decay
widths for vector mesons are also presented. Based on our results, we find that
the ψ(3770), ψ(4040), ψ(4160), ψ(4360), and ψ(4415)
can be assigned as the 1^3D_1-, 3^3S_1-, 2^3D_1-, 4^3S_1-, and
3^3D_1-dominated charmonium states, respectively. The ψ_3(3842) is a
good candidate of the ψ_3(1D) charmonium state. The calculated mass and
strong decay width of χ_c1(2P) with significant continuum contribution
(∼57%) favor the charmonium interpretation for the mysterious
χ_c1(3872). When considering the large uncertainty in the observed decay
width, the possibility to assign the χ_c0(3860) as the χ_c0(2P)
charmonium state cannot be ruled out. One may describe well the properties of
χ_c2(3930) with the χ_c2(2P) charmonium. The predictions on
properties of other cc̅ states can be tested by future experiments.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要