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arXiv 0908.1734hep-ph
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分子图像中$Z^+(4430)$的手征夸克模型研究

A chiral quark model study of $Z^+(4430)$ in the molecular picture

Yan-Rui Liu, Zong-Ye Zhang

摘要:

通过求解共振群方法方程,研究了手征夸克模型中S波荷电$D_1 \bar{D}^*$($D_1' \bar{D}^*$)系统的束缚态问题。我们的初步研究并不支持$Z^+(4430)$的分子假设。相反,如果$Z^+(4430)$真的是一种分子,那么它与$G$ -奇偶性相反的伴侣也应该存在,并且可能在$π^+η_c(2S)$、$J/ψπ^+π^0$或$ψ'π^+π^0$通道中发现。对于底层体系,我们发现$I^G$ = $1^+$和$I^G$ = $1^-$ $B_1 \bar{B}^*$($B_1' \bar{B}^*$)两种分子的存在都是可能的.

英文摘要:

We investigated the bound state problem of the S wave charged $D_1 \bar{D}^*$ ($D_1' \bar{D}^*$) system in a chiral quark model by solving the resonating group method equation. Our preliminary study does not favor the molecular assumption of $Z^+(4430)$. On the contrary, if $Z^+(4430)$ is really a molecule, its partner with opposite $G$-parity should also exist and probably may be found in the $π^+η_c(2S)$, $J/ψπ^+π^0$, or $ψ'π^+π^0$ channel. For the bottom systems, we found the existence of both $I^G$=$1^+$ and $I^G$=$1^-$ $B_1 \bar{B}^*$ ($B_1' \bar{B}^*$) molecules is possible.

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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