Mass spectra of doubly heavy tetraquarks in an improved chromomagnetic interaction model

Abstract

Doubly heavy tetraquark states are the prime candidates for tightly bound exotic states. We present a systematic study of the mass spectra of the $S$-wave doubly heavy tetraquark states $QQ\bar{q}\bar{q}$ ($q=u,d,s$ and $Q=c,b$) with different quantum numbers $J^P=0^{+}$, $1^{+}$, and $2^{+}$ in the framework of the improved chromomagnetic interaction (ICMI) model. The parameters in the ICMI model are obtained by fitting the conventional hadron spectra and are used directly to predict the masses of the tetraquark states. For heavy quarks, the uncertainties of the parameters are obtained by comparing the masses of doubly and triply heavy baryons with those given by lattice QCD, QCD sum rules, and potential models. Several compact and stable bound states are found in both the doubly charmed and doubly bottomed tetraquark systems. The predicted mass of the $cc\bar{u}\bar{d}$ state is consistent with the recent measurement from the LHCb collaboration.

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• Pentaquark and Tetraquark states
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Cited by in corpus (30)

• An updated review of the new hadron states
• Hadronic molecule interpretation of $T_{cc}^{+}$ and its beauty-partners
• Doubly heavy tetraquarks in a chiral-diquark picture
• Exotic Tetraquark states with two $\bar{b}$-quarks and $J^P=0^{+}$ and $1^{+}$ $B_s$ states in a nonperturbatively-tuned Lattice NRQCD setup
• Colour and baryon number fluctuation of preconfinement system in production process and T_cc structure
• Doubly heavy tetraquark multiplets as heavy antiquark-diquark symmetry partners of heavy baryons
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• 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
• Heavy flavor molecular states with strangeness
• The quasi-fission phenomeonon of double charm $T_{cc}^{+}$ induced by nucleon
• Going in quest of potential tetraquark interpretations for the newly observed $T_{\psi \psi }$ states in light of the diquark-antidiquark scenarios
• A new group of doubly charmed molecule with $T$-doublet charmed meson pair
• Magnetic moments of the doubly charged axial-vector $T_{cc}^{++}$ states
• Masses and Magnetic Moments of Doubly Heavy Tetraquarks via Diffusion Monte Carlo Method
• $T_{cc}^{+}$ and $X(3872)$ with the complex scaling method and $DD(\bar{D})\pi$ three-body effect
• Study of isoscalar scalar $bc\bar{u}\bar{d}$ tetraquark $T_{bc}$ from lattice QCD
• 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
• Triply heavy tetraquark states: masses and other properties
• Double-heavy tetraquarks with strangeness in the chiral quark model
• $bb\bar{u}\bar{d}$ and $bs\bar{u}\bar{d}$ tetraquarks from lattice QCD using two-meson and diquark-antidiquark variational basis
• Discovery of $T_{c\bar{s}0}^a(2900{)}^{0,++}$ implies new charmed-strange pentaquark system
• Models and Potentials in Hadron Spectroscopy
• Doubly charmed dibaryon states
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• Systematics of fully heavy dibaryons
• Fully heavy tetraquark states with a diquark-antidiquark configuration
• Prediction of an $I(J^P)=0(1^{-})$ $\bar{b}\bar{b}ud$ Tetraquark Resonance Close to the $B^{\ast }{B}^{\ast }$ Threshold Using Lattice QCD Potentials
• Investigating the two-pion exchange of the double charm $D{D}^{\ast }$ chiral interactions and $T_{cc}$
• Binding energy of the $T_{bb}$ tetraquark from lattice QCD with relativistic and nonrelativistic heavy-quark actions