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.
In addition, studying the production of these physical states from the nonleptonic B decay process is also essential to recognize their inner structure
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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.