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arXiv 2107.03496hep-ph
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赝标量$D(2900)$的衰变过程

Decay processes of a pseudoscalar $D(2900)$

Brenda B. Malabarba, K. P. Khemchandani, A Martinez Torres

摘要:

我们研究的$D(2900)$状态的衰变特性,与自旋宇称$0^-$,其存在提出了在早期的研究中的$D K\bar K$和耦合通道系统。在前面的工作中,我们发现在三体动力学中出现了一个质量约为2900 MeV的$D$介子,而赝标介子的无粲子系统形成了$f_0(980)$共振.受最近3000 MeV附近$D$介子实验研究的启发,我们现在研究$D(2900)$的二体衰变。我们发现,该态的性质决定了其主要衰变通道为$D^*π$、$D^{*}_s \bar K$和$D^*_{s0}(2317)\bar K$。结果表明,到最后一个的衰减宽度最大,使得$D^*_{s0}(2317)\bar K$系统是寻找$D(2900)$信号的最有利系统。我们比较了我们的状态与那些$D$介子状态,提出在夸克模型,近3000兆电子伏的衰变特性。我们希望我们的研究结果和讨论可以为未来的3000 MeV附近的粲介子的实验研究。

英文摘要:

We study the decay properties of a $D(2900)$ state, with spin-parity $0^-$, whose existence was proposed in an earlier study of the $D K\bar K$ and coupled channel system. It was found in the former work that a $D$-meson appears with a mass of about 2900 MeV from the three-body dynamics while the charmless subsystem of the pseudoscalar mesons forms the $f_0(980)$ resonance. Motivated by the recent experimental investigations of $D$-mesons around 3000 MeV, we now study the two-body decays of $D(2900)$. We find that the nature of the said state sets the main decay channels to be $D^*π$, $D^{*}_s \bar K$ and $D^*_{s0}(2317)\bar K$. It turns out that decay width to the last one is the largest, making the $D^*_{s0}(2317)\bar K$ system to be the most favorable one to look for a signal of $D(2900)$. We compare the decay properties of our state with those of the $D$-meson states, proposed within quark models, near 3000 MeV. We hope that our findings and discussions can be useful for the future experimental investigations of charm mesons around 3000 MeV.

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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