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arXiv 2111.05024hep-ph
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来自$D^{*}_s \bar D^*$和$J/ψK^*$耦合通道的$Z_{cs}$状态:$B^+ \to J/ψϕK^+$衰减中的信号

$Z_{cs}$ states from the $D^{*}_s \bar D^*$ and $J/ψK^*$ coupled channels: Signal in $B^+ \to J/ψϕK^+$ decay

Natsumi Ikeno, Raquel Molina, Eulogio Oset

摘要:

我们研究了$D^{*}_s \bar D^*$系统与耦合通道中的$J/ψK^*$,并观察到,在合理的值的截止用于正则化的循环,系统不开发一个绑定状态。然而,$J^P = 2^+$通道具有足够的吸引力来创建强尖点结构,该结构在$D^*_s \bar D^*$阈值处的$B^+ \to J/ψϕK^+$衰变中的$J/ψK^+$不变质量分布中出现。这样的结构是可见的实验$B^+ \to J/ψϕK^+$和$\bar B^0 \to J/ψK^+ K^-$衰变,与小的统计数据,我们的结果应该刺激进一步的测量在这一地区,鉴于尖点效应提供了有价值的信息强子动力学共振本身。

英文摘要:

We study the $D^{*}_s \bar D^*$ system in connection with the $J/ψK^*$ in coupled channels and observe that, within reasonable values of the cut-off used to regularize the loops, the system does not develop a bound state. However, the $J^P = 2^+$ channel has enough attraction to create a strong cusp structure that shows up in the $J/ψK^+$ invariant mass distribution in the $B^+ \to J/ψϕK^+$ decay at the $D^*_s \bar D^*$ threshold. Such structure is visible in the experimental $B^+ \to J/ψϕK^+$ and $\bar B^0 \to J/ψK^+ K^-$ decays, with small statistics, and our results should stimulate further measurements around this region, given the fact that cusp effects provide as valuable information on hadron dynamics as resonances themselves.

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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