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arXiv 1102.4142hep-phhep-ex
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可能的2S和1D粲介子和粲奇介子

Possible 2S and 1D charmed and charmed-strange mesons

Bing Chen, Ling Yuan, Ailin Zhang

备注：
6 pages, 5 tables, 4 figures, RevTex
发表信息：
Phys.Rev.D83:114025,2011
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摘要：

研究了$2S$和$1D$可能的激发态$D$和$D_s$，分析了BaBar合作组新观测到的粲态$D(2550)^0$、$D^\ast(2600)$、$D(2750)^0$和$D^\ast(2760)$.这些态的质量在Regge轨线唯象中被探索，强衰变宽度通过Eichten { \it et al.} \cite{Eichten}。质量和衰变宽度都表明$D(2550)^0$是$2^1S_0$的良好候选者。$D^\ast(2600)$和$D_{s1}^\ast(2700)^\pm$很可能是$2^3S_1$和$1^3D_1$与$J^P=1^-$和混合角为$ϕ\approx 19^0$的混合物。$D^\ast(2760)$和$D_{sJ}^\ast(2860)^\pm$分别是$1^3D_3$ $D$和$D_s$。$D(2750)^0$和$D^\ast(2760)$似乎是两种不同的状态，并且$D(2750)^0$很可能是$1D(2^-, \frac{5}{2})$，尽管还没有排除$1D(2^-, \frac{3}{2})$的可能性。可能存在一个未观测到的介子$D_{sJ}(2850)^\pm$对应于$D^\ast_{sJ}(2860)^\pm$。

英文摘要：

Possible $2S$ and $1D$ excited $D$ and $D_s$ states are studied, the charmed states $D(2550)^0$, $D^\ast(2600)$, $D(2750)^0$ and $D^\ast(2760)$ newly observed by the BaBar Collaboration are analyzed. The masses of these states are explored within the Regge trajectory phenomenology, and the strong decay widths are computed through the method proposed by Eichten {\it et al.}\cite{Eichten}. Both the mass and the decay width indicate that $D(2550)^0$ is a good candidate of $2^1S_0$. $D^\ast(2600)$ and $D_{s1}^\ast(2700)^\pm$ are very possible the admixtures of $2^3S_1$ and $1^3D_1$ with $J^P=1^-$ and a mixing angle $ϕ\approx 19^0$. $D^\ast(2760)$ and $D_{sJ}^\ast(2860)^\pm$ are possible the $1^3D_3$ $D$ and $D_s$, respectively. $D(2750)^0$ and $D^\ast(2760)$ seem two different states, and $D(2750)^0$ is very possible the $1D(2^-, \frac{5}{2})$ though the possibility of $1D(2^-, \frac{3}{2})$ has not been excluded. There may exist an unobserved meson $D_{sJ}(2850)^\pm$ corresponding to $D^\ast_{sJ}(2860)^\pm$.

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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