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arXiv 0803.4270hep-phhep-ex
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$Z^+(4430)$的二体开放魅力衰变

The two-body open charm decays of $Z^+(4430)$

Xiang Liu, Bo Zhang, Shi-Lin Zhu

摘要:

如果$Z^+(4430)$是一个$D_1\bar D^*$分子态,则两体开粲衰变$Z^+(4430)\to D^{+}\bar{D}^{*0}, D^{*+}\bar{D}^{0}, D^{*+}\bar{D}^{*0}$通过再散射机制发生,并且它们的分支比被强烈抑制。相比之下,$Z^+(4430)$很容易分裂成这些模式,具有较大的相空间,如果$Z^+(4430)$是四夸克态,它们将成为主要的衰变模式。对这些两体开放魅力模式和隐藏魅力模式$χ_{cJ}ρ$的实验研究将有助于区分不同的理论方案。

英文摘要:

The two-body open charm decays $Z^+(4430)\to D^{+}\bar{D}^{*0}, D^{*+}\bar{D}^{0}, D^{*+}\bar{D}^{*0}$ occur through the re-scattering mechanism and their branching ratios are strongly suppressed if $Z^+(4430)$ is a $D_1\bar D^*$ molecular state. In contrast, $Z^+(4430)$ falls apart into these modes easily with large phase space and they become the main decay modes if $Z^+(4430)$ is a tetraquark state. Experimental search of these two-body open charm modes and the hidden charm mode $χ_{cJ}ρ$ will help distinguish different theoretical schemes.

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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