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arXiv 1010.3607hep-phhep-ex
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X(3872)作为负宇称强子分子的强辐射衰变

Strong and radiative decays of X(3872) as a hadronic molecule with a negative parity

Masayasu Harada, Yong-Liang Ma

摘要:

将X(3872)看作具有$J^{PC} = 2^{-+}$的$DD^{\ast}$强子分子,用唯象拉格朗日方法研究了X(3872)的性质.我们发现,我们的模型约97.6%的同位旋零组件很好地解释了现有的数据,例如,比例$\mathcal{B}(X(3872) \to J/ψπ^+π^-π^0)/\mathcal{B}(X(3872) \to J/ψπ^+π^-)$。计算了$X(3872) \to γJ/ψ$和$γψ(2S) $的辐射衰变的部分宽度以及$X(3872) \to J/ψπ^+ π^-$、$J/ψπ^+π^-π^0$和$X(3872) \to χ_{cJ}π^0$的强衰变.我们的分析表明,比率$\mathcal{B}(X(3872) \to χ_{c0}π^0)/\mathcal{B}(X(3872) \to χ_{c1}π^0)$的测量可能表明X(3872)的性质。

英文摘要:

Properties of X(3872) are studied by regarding it as a $DD^{\ast}$ hadronic molecule with $J^{PC} = 2^{-+}$ in the phenomenological Lagrangian approach. We find that our model with about 97.6% isospin zero component explains the existing data nicely, for example, the ratio $\mathcal{B}(X(3872) \to J/ψπ^+π^-π^0)/\mathcal{B}(X(3872) \to J/ψπ^+π^-)$. We predict the partial widths of the radiative decays of $X(3872) \to γJ/ψ$, $γψ(2S) $ and the strong decays of $X(3872) \to J/ψπ^+ π^-$, $J/ψπ^+π^-π^0$ as well as $X(3872) \to χ_{cJ}π^0$. Our analysis shows that the measurement of the ratio $\mathcal{B}(X(3872) \to χ_{c0}π^0)/\mathcal{B}(X(3872) \to χ_{c1}π^0)$ may signal the nature of X(3872).

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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