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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1801.07091hep-ph
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揭示$B_c^- \to π^- J/ψω$衰变中$D^*\bar{D}^*$分子的态

Disclosing $D^*\bar{D}^*$ molecular states in the $B_c^- \to π^- J/ψω$ decay

L. R. Dai, J. M. Dias, E. Oset

摘要:

我们研究了$B_c^- \to π^- J/ψω$和$B_c^- \to π^- D^* \bar{D}^*$反应,并表明它们与两个共振的存在有关,即$X(3940)$和$X(3930)$,它们具有分子性质,与$D^* \bar{D}^*$的耦合最强,但也与$J/ψω$的耦合最强。因此,在$J/ψω$质量分布中,我们发现在$D^* \bar{D}^*$阈值处具有大强度的尖点,并预测尖点的峰值与接近$D^* \bar{D}^*$阈值的$D^* \bar{D}^*$分布的最大值之间的强度比,这是这两种共振的分子性质的不同特征。

英文摘要:

We study the $B_c^- \to π^- J/ψω$ and $B_c^- \to π^- D^* \bar{D}^*$ reactions and show that they are related by the presence of two resonances, the $X(3940)$ and $X(3930)$, that are of molecular nature and couple most strongly to $D^* \bar{D}^*$, but also to $J/ψω$. Because of that, in the $J/ψω$ mass distribution we find a cusp with large strength at the $D^* \bar{D}^*$ threshold and predict the ratio of strengths between the peak of the cusp and the maximum of the $D^* \bar{D}^*$ distribution close to $D^* \bar{D}^*$ threshold, which are distinct features of the molecular nature of these two resonances.

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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