Structure of the D{sub s0}(2317) and the strong coupling constant g{sub D{sub s}}{sub DK} with the light-cone QCD sum rules
Structure of the D{sub s0}(2317) and the strong coupling constant g{sub D{sub s}}{sub DK} with the light-cone QCD sum rules
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DOI：
10.1103/physrevd.73.094020
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发表时间：
2006-03
影响因子：
5
通讯作者：
Zhiguo Wang;S. Wan
中科院分区：
文献类型：
--
作者：
Zhiguo Wang;S. Wan
In this article, we take the point of view that the charmed scalar meson ${D}_{s0}(2317)$ is the conventional $c\overline{s}$ meson and calculate the strong coupling constant ${g}_{{D}_{s0}DK}$ within the framework of the light-cone QCD sum rules approach. The numerical values for the large scalar-$DK$ coupling constant ${g}_{{D}_{s0}DK}$ support the hadronic dressing mechanism. Just like the scalar mesons ${f}_{0}(980)$ and ${a}_{0}(980)$, the ${D}_{s0}(2317)$ may have small scalar $c\overline{s}$ kernel of the typical $c\overline{s}$ meson size. The strong coupling to the hadronic channels (or the virtual mesons loops) may result in smaller mass than the conventional scalar $c\overline{s}$ meson in the constituent quark models, and enrich the pure $c\overline{s}$ state with other components. The ${D}_{s0}(2317)$ may spend part (or most part) of its lifetime as virtual $DK$ state.
In this article, we take the point of view that the charmed scalar meson ${D}_{s0}(2317)$ is the conventional $c\overline{s}$ meson and calculate the strong coupling constant ${g}_{{D}_{s0}DK}$ within the framework of the light-cone QCD sum rules approach. The numerical values for the large scalar-$DK$ coupling constant ${g}_{{D}_{s0}DK}$ support the hadronic dressing mechanism. Just like the scalar mesons ${f}_{0}(980)$ and ${a}_{0}(980)$, the ${D}_{s0}(2317)$ may have small scalar $c\overline{s}$ kernel of the typical $c\overline{s}$ meson size. The strong coupling to the hadronic channels (or the virtual mesons loops) may result in smaller mass than the conventional scalar $c\overline{s}$ meson in the constituent quark models, and enrich the pure $c\overline{s}$ state with other components. The ${D}_{s0}(2317)$ may spend part (or most part) of its lifetime as virtual $DK$ state.