QCD sum rules yield masses 2.322 GeV (DK), 2.457 GeV (D*K), 2.538 GeV (DK*) matching D_s0(2317), D_s1(2460), D_s1(2536), with BK* at 6.158 GeV below threshold suggesting a bound state.
Measurement of the D_(sJ)(2317) and D_(sJ)(2460) Properties in e^+ e^- --> c c-bar Production
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abstract
The properties of the $\DsTT$ and $\DsFE$ mesons are studied using 125 ${\rm fb}^{-1}$ of $e^+e^- \to c \bar{c}$ data collected by the BaBar experiment. Preliminary mass estimates of $[2318.9\pm 0.3 ({\rm stat.}) \pm 0.9 ({\rm syst.})]$ \mevcc and $[2459.4 \pm 0.3 ({\rm stat.}) \pm 1.0 ({\rm syst.})]$ \mevcc are obtained. Searches are performed for the decay to the $D_s^+$ meson along with one or more $\piz$, $\pi^+$, or $\gamma$ particles. A search is also performed for neutral and doubly-charged partners.
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Analysis of the hadronic molecules $DK$, $D^*K$, $DK^*$ and their bottom analogs with QCD sum rules
QCD sum rules yield masses 2.322 GeV (DK), 2.457 GeV (D*K), 2.538 GeV (DK*) matching D_s0(2317), D_s1(2460), D_s1(2536), with BK* at 6.158 GeV below threshold suggesting a bound state.