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arXiv 1107.5889hep-ph
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QCD求和规则对$D_0$和$B_0$介子的中质量修正

In-medium mass modifications of the $D_0$ and $B_0$ mesons with the QCD sum rules

Zhi-Gang Wang, Tao Huang

摘要:

本文利用QCD求和规则计算了标量介子$D_0$和$B_0$的介质内质量修正。在计算中,我们观察到$D_0N$和$B_0N$的散射长度分别约为$1.1\,\rm{fm}$和$4.1\,\rm{fm}$,$δM_{D_0}=69\,\rm{MeV}$和$δM_{B_0}=217\,\rm{MeV}$的质量位移,以及$D_0N$和$B_0N$之间的相互作用是排斥的.正的质量位移表明,更高的charmonium状态到$D_0\bar{D}_0$对的衰变被抑制。

英文摘要:

In this article, we calculate the in-medium mass modifications of the scalar mesons $D_0$ and $B_0$ using the QCD sum rules. In calculations, we observe that the $D_0N$ and $B_0N$ scattering lengths are about $1.1\,\rm{fm}$ and $4.1\,\rm{fm}$ respectively, the mass-shifts $δM_{D_0}=69\,\rm{MeV}$ and $δM_{B_0}=217\,\rm{MeV}$, and the $D_0N$ and $B_0N$ interactions are repulsive. The positive mass-shifts indicate that the decays of the higher charmonium states into the $D_0\bar{D}_0$ pair are suppressed.

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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