arXiv 1111.35332011-11-15hep-ph

手征夸克模型中的X（1835），X（2120），X（2370）和$η(1760)$

X(1835), X(2120), X(2370) and $η(1760)$ in chiral quark model

Shaona Chen, Jialun Ping

备注：: 9 pages, 5 figures

摘要：

通过分析组分夸克模型中的介子谱，我们发现赝标介子$η'(2^1S_0)$、$η(4^1S_0)$、$η'(3^1S_0)$和$η'(4^1S_0)$是$η(1760)$、X（1835）、X（2120）和X（2370）的可能候选者.在$^3P_0$模型的框架内计算了这些赝标量到所有可能衰变模式的强衰变宽度。虽然$η'(2^1S_0)$的总宽度与北京谱仪对$η(1760)$的实验值一致，但对$ωω$的部分衰变宽度太小，与北京谱仪的结果不一致。如果把X（1835）态解释为$η(4^1S_0)$，则总的衰变宽度与实验数据是一致的，主要的衰变模式将是$πa_0(980)$和$πa_0(1450)$，这需要进行检验。由于衰变宽度的不相容性，X（2120）和X（2370）指定为$η'(3^1S_0)$和$η'(4^1S_0)$在目前的计算中也是不受欢迎的。

英文摘要：

By analyzing the meson spectra obtained in the constituent quark model, we find that the pseudoscalar mesons $η'(2^1S_0)$, $η(4^1S_0)$, $η'(3^1S_0)$ and $η'(4^1S_0)$ are the possible candidates of $η(1760)$, X(1835), X(2120) and X(2370). The strong decay widths of these pseudoscalars to all the possible decay modes are calculated within the framework of the $^3P_0$ model. Although the total width of $η'(2^1S_0)$ is compatible with the experimental value of BES for $η(1760)$, the partial decay width to $ωω$ is too small, which is not consistent with the result of BES. If the state X(1835) is interpreted as $η(4^1S_0)$, the total decay width is compatible with the experimental data, and the main decay modes will be $πa_0(980)$ and $πa_0(1450)$, which needs to be checked. The assignment of X(2120) and X(2370) to $η'(3^1S_0)$ and $η'(4^1S_0)$ is also disfavored in the present calculation because of the incompatibility of the decay widths.

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英文摘要：

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