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- W3049259097 abstract "Very recently the LHCb Collaboration reported the discovery of two open charm tetraquark states, $X_{0}(2866)$ and $X_{1}(2904)$. In the present work, we study the $D^{(ast)}$ and $bar{K}^{(ast)}$ interaction in the one-boson exchange model and show that the $X_{0}(2866)$ can be understood as a $D^{ast}bar{K}^{ast}$ molecule with $I(J^{P})=0(0^{+})$, or at least it has a large molecular component. On the other hand, the $X_{1}(2904)$ can not be interpreted as a molecular state. Inspired by the discovery of the $X_0(2866)$ and the fact that the $D^*bar{K}^*$ interaction is strong enough to generate a bound state, we also discuss likely existence of other open charm molecules. In the meson-meson sector, two molecules near the mass thresholds of $DD^{ast}$ and $D^{ast}D^{ast}$ with $I(J^{P})=0(1^{+})$ are obtained, and using the heavy quark flavor symmetry their $bar{B}bar{B}^{ast}$ and $bar{B}^{ast}bar{B}^{ast}$ counterparts are also predicted. In the meson-baryon sector, 7 open charm molecules with $I=1/2$ near the mass thresholds of $D^{(ast)}Sigma_{c}^{(ast)}$ naturally appear, as dictated by the heavy quark spin symmetry." @default.
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- W3049259097 date "2020-11-09" @default.
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- W3049259097 doi "https://doi.org/10.1103/physrevd.102.091502" @default.
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