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arXiv 2202.00508hep-phhep-ex
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检测$X_0(2866)$的$I=0, J^P=1^+$配偶体的$\bar{B}^0 \to D^{*+} \bar{D}^{*0} K^- $反应

The $\bar{B}^0 \to D^{*+} \bar{D}^{*0} K^- $ reaction to detect the $I=0, J^P=1^+$ partner of the $X_0(2866)$

L. R. Dai, R. Molina, E. Oset

摘要:

我们选择了$\bar{B}^0 \to D^{*+} \bar{D}^{*0} K^-$反应,以观察源自$D^*\bar{K}^*$分子图像的$X_0(2866)$的$I=0, J^P=1^+$($R_1$)配偶体状态。该反应通过外部发射以最有利的Cabibbo衰变模式进行,并且观察到$R_1$状态作为相对于$D^{*+} K^-$光谱中的背景的非常强的峰。该反应中$R_1$生成的支化比估计为$4\times 10^{-3}$的数量级。应用于$B^+ \to D^- D^+ K^+$反应的所用方法在$D^- K^+$光谱中产生的信号与背景比与观察到$X_0(2866)$的LHCb实验非常一致。

英文摘要:

We have chosen the $\bar{B}^0 \to D^{*+} \bar{D}^{*0} K^-$ reaction in order to observe the $I=0, J^P=1^+$ ($R_1$) partner state of the $X_0(2866)$ stemming from the $D^*\bar{K}^*$ molecular picture. The reaction proceeds via external emission in the most favored Cabibbo decay mode and one observes the $R_1$ state as a very strong peak versus the background in the $D^{*+} K^-$ spectrum. The branching ratio for $R_1$ production in this reaction is estimated of the order of $4\times 10^{-3}$. The method used, applied to the $B^+ \to D^- D^+ K^+$ reaction, produces a ratio of signal to background in the $D^- K^+$ spectrum in very good agreement with the LHCb experiment that observed the $X_0(2866)$.

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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