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arXiv 0709.1312hep-ph
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Z+的底部模拟(4433)

Bottomed Analog of Z+(4433)

Kingman Cheung, Wai-Yee Keung, Tzu-Chiang Yuan

摘要:

BELLE新观察到的$Z^+ (4433)$共振被认为是由$(cu)(\bar c \bar d)$组成的四夸克束缚态。我们提出了这种束缚态的底模拟,即用底夸克代替其中一个魅夸克,从而形成$Z_{bc}^{0, \pm, \pm\pm}$。其中一个$Z_{bc}$带双重电荷。预测$Z_{bc}$的质量约为7.6 GeV。这种双电荷束缚态可以通过其衰变为$B_c^\pm π^\pm$来检测。同样,我们也可以用底夸克和反夸克分别代替$Z^+ (4433)$的粲夸克和反夸克,从而形成$Z_{bb}$($Z^+ (4433)$的底夸克类似物)。预测$Z_{bb}$的质量约为10.7 GeV。

英文摘要:

The newly observed $Z^+ (4433)$ resonance by BELLE is believed to be a tetraquark bound state made up of $(cu)(\bar c \bar d)$. We propose the bottomed analog of this bound state, namely, by replacing one of the charm quarks by a bottom quark, thus forming $Z_{bc}^{0, \pm, \pm\pm}$. One of the $Z_{bc}$ is doubly charged. The predicted mass of $Z_{bc}$ is around 7.6 GeV. This doubly-charged bound state can be detected by its decay into $B_c^\pm π^\pm$. Similarly, we can also replace both charm quark and antiquark of the $Z^+ (4433)$ by bottom quark and antiquark, respectively, thus forming $Z_{bb}$ the bottomonium analog of $Z^+ (4433)$. The predicted mass of $Z_{bb}$ is about 10.7 GeV.

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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