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arXiv 1006.0211hep-phhep-ex
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X(3872)的动力学起源和极结构

Dynamical origin and the pole structure of X(3872)

I. V. Danilkin, Yu. A. Simonov

摘要:

将通道与衰变通道耦合的动力学机制应用于粲偶素- $DD^*$态与$J^{PC}=1^{++}$耦合的情况。进行了极点分析,计算了$DD^*$的产生截面,与实验定性一致。在$D_0D^*_0$阈值和平坦的背景下的尖锐的峰被示出是由于Breit-Wigner共振,从$2^3P_1$,$Q\bar Q$状态的3954 MeV的原始位置移动的通道耦合。对$n=2$、$^3P_2$、$^1P_1$、$^3P_0$进行类似的分析,使我们能够将第一个与观察到的$Z(3930)$ J=2联系起来,并解释了$^3P_0$的命运。

英文摘要:

The dynamical mechanism of channel coupling with the decay channels is applied to the case of coupled charmonium - $DD^*$ states with $J^{PC}=1^{++}$. A pole analysis is done and the $DD^*$ production cross section is calculated in qualitative agreement with experiment. The sharp peak at the $D_0D^*_0$ threshold and flat background are shown to be due to Breit-Wigner resonance, shifted by channel coupling from the original position of 3954 MeV for the $2^3P_1$, $Q\bar Q$ state. A similar analysis, applied to the $n=2$, $^3P_2$, $^1P_1$, $^3P_0$, allows us to associate the first one with the observed $Z(3930)$ J=2 and explains the destiny of $^3P_0$.

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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