Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
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DOI：
10.1103/physrevd.82.114014
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发表时间：
2010-09
影响因子：
5
通讯作者：
X. Zhong
中科院分区：
文献类型：
--
作者：
X. Zhong
在组成夸克模型中研究了新观测到的 D(2550)、D(2600)、D(2750) 和 D(2760) 的强衰变特性。据预测，D(2760)和D(2750)似乎是两个重叠共振。 D(2760) 可以被识别为 J p = 3 - 的 1 3 D 3 ，而 D(2750) 最有可能是通过 1 1 D 2 -1 3 D 2 混合得到的高质量混合态 |1D 2 '> H (J P = 2 - )。 D(2600) 通过 1 3 D 1 -2 3 S 1 混合有利于低质量混合态 |(SD) 1〉L (J p = 1 - )。作为 2 1 S 0 赋值的 D(2550) 由于其在实验中给出的宽度太宽而存在争议。
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 3 D 3 with J p = 3 - , while the D(2750) is most likely to be the high-mass mixed state |1D 2 '〉 H (J P = 2 - ) via the 1 1 D 2 -1 3 D 2 mixing. The D(2600) favors the low-mass mixed state |(SD) 1〉L (J p = 1 - ) via the 1 3 D 1 -2 3 S 1 mixing. The D(2550) as the 2 1 S 0 assignment bears controversies for its too-broad width given in experiments.