Mass spectrum and strong decays of tetraquark $\bar{c}\bar{s}qq$ states

Abstract

We systematically study the mass spectrum and strong decays of the S-wave $\bar{c}\bar{s}qq$ states in the compact tetraquark scenario with the quark model. The key ingredients of the model are the Coulomb, the linear confinement, and the hyperfine interactions. The hyperfine potential leads to the mixing between different color configurations, as well as the large mass splitting between the two ground states with $I(J^P)=0(0^{+})$ and $I(J^P)=1(0^{+})$. We calculate their strong decay amplitudes into the ${\bar{D}}^{(\ast )}{K}^{(\ast )}$ channels with the wave functions from the mass spectrum calculation and the quark interchange method. We examine the interpretation of the recently observed $X_0(2900)$ as a tetraquark state. The mass and decay width of the $I(J^P)=1(0^{+})$ state are $M=2941$ MeV and ${\Gamma }_X=26.6$ MeV, respectively, which indicates that it might be a good candidate for the $X_0(2900)$. Meanwhile, we also obtain an isospin partner state $I(J^P)=0(0^{+})$ with $M=2649$ MeV and ${\Gamma }_{X\to \bar{D}K}=48.1$ MeV, respectively. Future experimental search for $X(2649)$ will be very helpful.

11 pages, 4 figures

References in corpus (22)

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• $X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks
• Stable double-heavy tetraquarks: spectrum and structure
• Open-charm tetraquark $X_c$ and open-bottom tetraquark $X_b$
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• Probing hidden-charm decay properties of $P_c$ states in a molecular scenario
• A study of the decays of $S-$wave ${\bar{D}}^{\ast }{K}^{\ast }$ hadronic molecules: the scalar $X_0(2900)$ and its spin partners $X_{J(J=1,2)}$
• Spectrum and rearrangement decays of tetraquark states with four different flavors
• The $X_0(2900)$ and its heavy quark spin partners in molecular picture
• $X_{0,1}$(2900) and $(D^{-}{K}^{+})$ invariant mass from QCD Laplace sum rules at NLO
• Kinematical Cusp and Resonance Interpretations of the $X(2900)$
• Discriminating among interpretations for the $X(2900)$ states
• Branching fractions of $B^{-}\to D^{-}{X}_{0,1}(2900)$ and their implications
• The hidden-charm strong decays of the $Z_c$ states
• $X_J(2900)$ states in a hot hadronic medium

Cited by in corpus (34)

• An updated review of the new hadron states
• Hadronic molecules in B decays
• Doubly heavy tetraquarks in an extended chromomagnetic model
• Heavy-strange meson molecules and possible candidates $D_{s0}^{\ast }(2317)$, $D_{s1}(2460)$, and $X_0(2900)$
• How to understand the $X(2900)$?
• 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
• Newly observed $X(4630)$: a new charmoniumlike molecule
• Mass spectra and decays of open-heavy tetraquark states
• On the structures of new scalar resonances $T_{cs0}^a(2900{)}^{++}$ and $T_{cs0}^a(2900{)}^0$
• Vector resonance $X_1(2900)$ and its structure
• Modeling the resonance $T_{cs0}^a(2900{)}^{++}$ as a hadronic molecule $D^{\ast +}{K}^{\ast +}$
• Spectrum of the molecular tetraquarks: Unraveling the $T_{cs0}(2900)$ and $T_{c\bar{s}0}^a(2900)$
• Color flux-tube nature of the states $T_{cs}(2900)$ and $T_{c\bar{s}}^a(2900)$
• Unified description of the $Qs\bar{q}\bar{q}$ molecular bound states, molecular resonances and compact tetraquark states in the quark potential model
• The ${\bar{B}}^0\to D^{\ast +}{\bar{D}}^{\ast 0}{K}^{-}$ reaction to detect the $I=0,J^P=1^{+}$ partner of the $X_0(2866)$
• Possibility of $T_{c\bar{s}}(2900)$ as the resonance-like structure induced by threshold effects
• Prediction of possible $D{K}_1$ bound states
• The roles of the $T_{c\bar{s}0}(2900{)}^0$ and $D_0^{\ast }(2300)$ in the process $B^{-}\to D_s^{+}{K}^{-}{\pi }^{-}$
• Magnetic moment of the $X_1(2900)$ state in the diquark-antidiquark picture
• Looking for the exotic $X_0(2866)$ and its $J^P=1^{+}$ partner in the ${\bar{B}}^0\to D^{(\ast )+}{K}^{-}{K}^{(\ast )0}$ reactions
• Molecular states of $D^{\ast }{D}^{\ast }{\bar{K}}^{\ast }$ nature
• 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 $[ud][\overline{c}\overline{s}]$?
• Method to observe the $J^P=2^{+}$ partner of the $X_0(2866)$ in the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ reaction
• Exotic molecular meson states of $B^{(\ast )}{K}^{(\ast )}$ nature
• Doubly charmed hexaquarks in the diquark picture
• Double pole structures of $X_1(2900)$ as the $P$-wave ${\bar{D}}^{\ast }{K}^{\ast }$ resonances
• Observation of the open-charm tetraquark candidate $T_{cs0}^{\ast }(2870{)}^0$ in the $B^{-}\to D^{-}{D}^0{K}_{\mathrm{S}}^0$ decay
• Predictions of super-exotic heavy mesons from $K^{\ast }{B}^{\ast }{B}^{\ast }$ interactions
• $D_1(2420)$ and its interactions with a kaon: open charm states with strangeness
• Systematic exploration of triply heavy tetraquarks: spectroscopic and decay characteristics
• Exotic hadrons associated with $b$-quark
• Investigation of $T_{cs0}^{\ast }(2870{)}^0$ in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the PACIAE model