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arXiv 1302.4496hep-phhep-exhep-latnucl-th
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$J^{PC}=3^{-+}$分子是否可行?

Is $J^{PC}=3^{-+}$ molecule possible?

W. Zhu, Yan-Rui Liu, T. Yao

摘要:

带电的粲偶素类态的证实表明重夸克分子应该存在。本文讨论了$J^{PC}=3^{-+}$分子态的可能性。在S波$C=+$ $D^*\bar{D}_2^*$态的单玻色子交换模型研究中,人们发现,对于$π$和$σ$交换,最强的吸引是在$J=3$和$I=0$的情况下。数值分析表明,这种强子束缚态可能存在,如果一个唯象的截止参数约为2.3 GeV(1.5 GeV)是合理的偶极()型的形状因子在一π交换模型。一旦包括$σ$交换贡献,结合溶液的截止值可降低至较小值。如果在通道$J/ψω$(P波)中观察到一个在$D^*\bar{D}_2^*$阈值($\approx$ 4472 MeV)附近的状态,则重夸克自旋对称性意味着它不是$c\bar{c}$介子,而$J^{PC}$很可能是$3^{-+}$。

英文摘要:

The confirmation of charged charmonium-like states indiates that heavy quark molecules should exist. We here discuss the possibility of a molecule state with $J^{PC}=3^{-+}$. In a one-boson-exchange model investigation for the S wave $C=+$ $D^*\bar{D}_2^*$ states, one finds that the strongest attraction is in the case $J=3$ and $I=0$ for both $π$ and $σ$ exchanges. Numerical analysis indicates that this hadronic bound state might exist if a phenomenological cutoff parameter around 2.3 GeV (1.5 GeV) is reasonable with a dipole (monopole) type form factor in the one-pion-exchange model. The cutoff for binding solutions may be reduced to a smaller value once the $σ$ exchange contribution is included. If a state around the $D^*\bar{D}_2^*$ threshold ($\approx$4472 MeV) in the channel $J/ψω$ (P wave) is observed, the heavy quark spin symmetry implies that it is not a $c\bar{c}$ meson and the $J^{PC}$ are likely to be $3^{-+}$.

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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