Doubly heavy tetraquarks in a chiral-diquark picture

Abstract

Energy spectrum of doubly heavy tetraquarks, $T_{QQ}$ ($QQ\bar{q}\bar{q}$ with $Q=c,b$ and $q=u,d,s$), is studied in the potential chiral-diquark model. Using the chiral effective theory of diquarks and the quark-diquark-based potential model, the $T_{bb}$, $T_{cc}$, and $T_{cb}$ tetraquarks are described as a three-body system composed of two heavy quarks and an antidiquark. We find several $T_{bb}$ bound states, while no $T_{cc}$ and $T_{cb}$ (deep) bound state is seen. We also study the change of the $T_{QQ}$ tetraquark masses under restoration of chiral symmetry.

arXiv comment16 pages, 14 Figures, 10 Tables

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Cited by in corpus (22)

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• Revisiting the $D{D}^{\ast }$ chiral interactions with the local momentum-space regularization up to the third order and the nature of $T_{cc}^{+}$
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• Exploring the magnetic dipole moments of $T_{QQ\bar{q}\bar{s}}$ and $T_{QQ\bar{s}\bar{s}}$ states in the framework of QCD light-cone sum rules
• Searching for doubly charmed tetraquark candidates $T_{cc}$ and $T_{cc\bar{s}}$ in $B_c$ decays
• Doubly heavy tetraquark states in a mass splitting model
• Magnetic dipole moments of $B_{(s)}^{(\ast )}{B}_{(s)}^{(\ast )}$ states
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• Strong decays of singly heavy baryons from a chiral effective theory of diquarks
• $bb\bar{u}\bar{d}$ and $bs\bar{u}\bar{d}$ tetraquarks from lattice QCD using two-meson and diquark-antidiquark variational basis
• Isospin violation effect and three-body decays of the $T_{cc}^{+}$ state
• Investigating the Isospin Property of $T_{cc}^{+}$ from its Dalitz Plot Distribution
• Mass and decay width of $T_{ccs}$ from symmetries
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• $P$-wave states $T_{bb}^{-}$ from diquarks
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• Lattice study of scattering phase shifts for $D{D}^{\ast }$ and $B{B}^{\ast }$ systems using twisted boundary conditions: Search for bound state formation
• Chiral effective theory of scalar and vector diquarks revisited
• Binding energy of the $T_{bb}$ tetraquark from lattice QCD with relativistic and nonrelativistic heavy-quark actions
• Hadronic molecule model for the doubly charmed state $T_{cc}^{+}$