Exotic $bc\bar{q}\bar{q}$ four-quark states

Abstract

We carry out a systematic study of exotic $Q{Q}^{\prime }\bar{q}\bar{q}$ four-quark states containing distinguishable heavy flavors, $b$ and $c$. Different generic constituent models are explored in an attempt to extract general conclusions. The results are robust, predicting the same sets of quantum numbers as the best candidates to lodge bound states independently of the model used, the isoscalar $J^P=0^{+}$ and $J^P=1^{+}$ states. The first state would be strong and electromagnetic-interaction stable while the second would decay electromagnetically to $\bar{B}D\gamma$. Isovector states are found to be unbound, preventing the existence of charged partners. The interest on exotic heavy-light tetraquarks with non identical heavy-flavors comes reinforced by the recent estimation of the production rate of the isoscalar $bc\bar{u}\bar{d}$ $J^P=1^{+}$ state, two orders of magnitude larger than that of the $bb\bar{u}\bar{d}$ analogous state.

arXiv commentAccepted for publication in PRD

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Cited by in corpus (29)

• Pentaquark and Tetraquark states
• A survey of heavy-heavy hadronic molecules
• Tetra- and penta-quark structures in the constituent quark model
• Heavy-quark spin and flavour symmetry partners of the X(3872) revisited: what can we learn from the one boson exchange model?
• Doubly-heavy tetraquarks
• $T_{cc}^{+}$ and its partners
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• A lattice investigation of exotic tetraquark channels
• Stable double-heavy tetraquarks: spectrum and structure
• $QQ\bar{q}\bar{q}$ in a chiral constituent quark model
• Double-heavy tetraquark states with heavy diquark-antiquark symmetry
• Spectroscopy, lifetime and decay modes of the $T_{bb}^{-}$ tetraquark
• Doubly heavy tetraquarks in a chiral-diquark picture
• Doubly Heavy Tetraquark Resonant States
• Production of exotic tetraquarks $QQ\bar{q}\bar{q}$ in heavy-ion collisions at the LHC
• Search for $\bar{b}\bar{b}us$ and $\bar{b}\bar{c}ud$ tetraquark bound states using lattice QCD
• Shallow Bound States and Hints for Broad Resonances with Quark Content $\bar{b}\bar{c}ud$ in $B$-$\bar{D}$ and $B^{\ast }$-$\bar{D}$ Scattering from Lattice QCD
• Bound isoscalar axial-vector $bc\bar{u}\bar{d}$ tetraquark $T_{bc}$ from lattice QCD using two-meson and diquark-antidiquark variational basis
• Masses and Magnetic Moments of Doubly Heavy Tetraquarks via Diffusion Monte Carlo Method
• Semileptonic and nonleptonic decays of the axial-vector tetraquark $T_{bb;\overline{u}\overline{d}}^{-}$
• Study of isoscalar scalar $bc\bar{u}\bar{d}$ tetraquark $T_{bc}$ from lattice QCD
• Doubly charmed multibaryon systems
• Stable scalar tetraquark $T_{bb;\bar{u}\bar{d}}^{-}$
• Fully open-flavor tetraquark states $bc\bar{q}\bar{s}$ and $sc\bar{q}\bar{b}$ with $J^P=0^{+},1^{+}$
• Semileptonic decays of the scalar tetraquark $Z_{bc;\overline{u}\overline{d}}^0$
• Doubly heavy tetraquark states in a mass splitting model
• Decay modes of the scalar exotic meson $T_{bs;\overline{u}\overline{d}}^{-}$
• Structure of open-flavour four-quark states in the charm and bottom region
• Hidden and open heavy-flavor hadronic states