Tetraquarks with open charm favor

Abstract

Inspired by the recent report of the exotic states $X_0(2900)$ and $X_1(2900)$ with four different quark flavors in the $D^{-}{K}^{+}$ invariant mass distributions of the decay process $B^{+}\to D^{+}{D}^{-}{K}^{+}$ by the LHCb collaboration, we systematically investigate the tetraquarks composed of $ud\bar{s}\bar{c}$ with meson-meson and diquark-antidiquark structures in the quark delocalization color screening model. We find that the $X_0(2900)$ can be interpreted as the molecular state $\overline{D^{\ast }}{K}^{\ast }$ with $I{J}^P=00^{+}$. Moreover, two bound states are obtained by the channel coupling calculation, with energies $2341.2$ MeV for $I{J}^P=00^{+}$ and $2489.7$ MeV for $I{J}^P=01^{+}$, respectively. We also extend our study to the $uc\bar{d}\bar{s}$ systems and find that there is no any bound state, so the $D_{s0}(2317)$ cannot be identified as the $DK$ molecular state in present calculation. Besides, several resonance states with the diquark-antidiquark configuration are possible in both $ud\bar{s}\bar{c}$ and $uc\bar{d}\bar{s}$ systems. All these open charm bound states and resonances are worth searching in the future experiments.

8 pages, 2 figures. arXiv admin note: text overlap with arXiv:1902.05778

References in corpus (9)

• $X_0(2866)$ as a $D^{\ast }{\bar{K}}^{\ast }$ molecular state
• Search for structure in the $B_s^0{\pi }^{\pm }$ invariant mass spectrum
• $X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks
• Open-charm tetraquark $X_c$ and open-bottom tetraquark $X_b$
• Analysis of the $X_0(2900)$ as the scalar tetraquark state via the QCD sum rules
• Strong decays of ${\bar{D}}^{\ast }{K}^{\ast }$ molecules and the newly observed $X_{0,1}$ states
• First exotic hadron with open heavy flavor: $cs\bar{u}\bar{d}$ tetraquark
• Open charm and bottom tetraquarks in an extended relativized quark model
• The $X_0(2900)$ and its heavy quark spin partners in molecular picture

Cited by in corpus (18)

• An updated review of the new hadron states
• Tetra- and penta-quark structures in the constituent quark model
• New scalar resonance $X_0(2900)$ as a ${\overline{D}}^{\ast }{K}^{\ast }$ molecule: Mass and width
• Heavy-strange meson molecules and possible candidates $D_{s0}^{\ast }(2317)$, $D_{s1}(2460)$, and $X_0(2900)$
• The $\mathbf{sQ}\bar{\mathbf{q}}\bar{\mathbf{q}}$ $(\mathbf{q}=\mathbf{u},\mathbf{d};\mathbf{Q}=\mathbf{c},\mathbf{b})$ tetraquarks in the chiral quark model
• Charmed-strange tetraquarks and their decays in a potential quark model
• X_1(2900) as a D_1 K molecule
• On the structures of new scalar resonances $T_{cs0}^a(2900{)}^{++}$ and $T_{cs0}^a(2900{)}^0$
• The decays of the fully open flavor state $T_{c\bar{s}0}^0$ in a $D^{\ast }{K}^{\ast }$ molecule scenario
• Modeling the resonance $T_{cs0}^a(2900{)}^{++}$ as a hadronic molecule $D^{\ast +}{K}^{\ast +}$
• Color flux-tube nature of the states $T_{cs}(2900)$ and $T_{c\bar{s}}^a(2900)$
• X(2900) in a chiral quark model
• Possibility of $T_{c\bar{s}}(2900)$ as the resonance-like structure induced by threshold effects
• Prediction of possible $D{K}_1$ bound states
• Searching for $X_0(2900)$ and $X_1(2900)$ through the kaon induced reactions
• Is the resonance $X_0(2900)$ a ground-state or radially excited scalar tetraquark $[ud][\overline{c}\overline{s}]$?
• Predictions of super-exotic heavy mesons from $K^{\ast }{B}^{\ast }{B}^{\ast }$ interactions
• Investigation of meson-meson interaction