QCD sum rule approach to the new mesons and the $g_{D_{sJ}DK}$ coupling constant

Details QCD sum rule approach to the new mesons and the $g_{D_{sJ}DK}$ coupling constant QCD sum rule approach to the new mesons and the $g_{D_{sJ}DK}$ coupling constant

2006-10-24

arxiv.org/abs/hep-ph/0610320v1

Braz.J.Phys.37:742-744,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages 1 eps figure, proceedings of the 36th. International Symposium on Multiparticle Dynamics (ISMD 2006)

Scientific paper

We use diquark-antidiquark currents to investigate the masses and partial decay widths of the recently observed mesons $D_{sJ}^{+}(2317)$, $D_0^{*0}(2308)$ and X(3872), considered as four-quark states, in a QCD sum rule approach. In particular we investigate the coupling constant $g_{D_{sJ}DK}$. We found that the $g_{D_{sJ}DK}$ obtained in this four-quark scenario is smaller than the coupling constant obtained when $D_{sJ}^{+}(2317)$ is considered as a conventional $c\bar{s}$ state.

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