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arXiv 2402.02765hep-phhep-exhep-latnucl-th
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耦合道模型中的粲偶素态

Charmonium states in a coupled-channel model

Zi-Long Man, Cheng-Rui Shu, Yan-Rui Liu, Hong Chen

AI总结:

本研究在含$^3P_0$夸克对产生机制的耦合道模型中系统研究粲偶素的质量谱与开粲衰变等性质,明确了多个粲偶素态的归属,为相关实验检验提供了理论依据。

摘要:

我们在采用$^3P_0$夸克-反夸克对产生机制的耦合道模型中,系统研究了粲偶素态的质量谱和两体开粲强衰变过程,给出了质量、质量位移、$c\bar{c}$组分占比以及开粲衰变宽度的计算结果,同时还给出了矢量介子的S-D波混合角和双电子衰变宽度。基于研究结果,我们发现$ψ(3770)$、$ψ(4040)$、$ψ(4160)$、$ψ(4360)$和$ψ(4415)$可分别归为以$1^3D_1$、$3^3S_1$、$2^3D_1$、$4^3S_1$和$3^3D_1$为主的粲偶素态;$ψ_3(3842)$是$ψ_3(1D)$粲偶素态的理想候选者。具有显著连续谱贡献(约57%)的$χ_{c1}(2P)$的计算质量和强衰变宽度,支持将神秘的$χ_{c1}(3872)$解释为粲偶素的观点。考虑到观测到的衰变宽度存在较大不确定性,将$χ_{c0}(3860)$归为$χ_{c0}(2P)$粲偶素态的可能性无法被排除。人们可以用$χ_{c2}(2P)$粲偶素很好地描述$χ_{c2}(3930)$的性质。我们对其他$c\bar{c}$态性质的预测可通过未来实验进行检验。

英文摘要:

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 $c\bar{c}$ 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 ($\sim$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 $c\bar{c}$ states can be tested by future experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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