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arXiv 1009.0359hep-phhep-ex
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新观测到的$D(2550)$、$D(2600)$、$D(2750)$和$D(2760)$的强衰变

Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$

Xian-Hui Zhong

摘要:

在组分夸克模型下研究了新观测到的$D(2550)$、$D(2600)$、$D(2750)$和$D(2760)$的强衰变性质.预计$D(2760)$和$D(2750)$似乎是两个重叠的共振。$D(2760)$可以被识别为具有$J^P=3^-$的$1^3D_3$,而$D(2750)$最有可能是通过$1^1D_2$-$1^3D_2$混合的高质量混合态$|1{D_2}'>_H$($J^P=2^-$)。$D(2600)$通过$1^3D_1$-$2^3S_1$混合倾向于低质量混合态$|(SD)_1>_L$ $(J^P=1^-)$。作为$2^1S_0$赋值的$D(2550)$在实验中给出的宽度太宽而引起争议。

英文摘要:

The strong decay properties of the newly observed $D(2550)$, $D(2600)$, $D(2750)$ and $D(2760)$ are studied in a constituent quark model. It is predicted that the $D(2760)$ and $D(2750)$ seem to be two overlapping resonances. The $D(2760)$ could be identified as the $1^3D_3$ with $J^P=3^-$, while the $D(2750)$ is most likely to be the high-mass mixed state $|1{D_2}'>_H$ ($J^P=2^-$) via the $1^1D_2$-$1^3D_2$ mixing. The $D(2600)$ favors the low-mass mixed state $|(SD)_1>_L$ $(J^P=1^-)$ via the $1^3D_1$-$2^3S_1$ mixing. The $D(2550)$ as the $2^1S_0$ assignment bears controversies for its too broad width given in experiments.

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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