Analysis of bound and resonant states of doubly heavy tetraquarks with spin $J\le 2$

Abstract

Recently, a number of exotic hadrons have been reported in the experiments, and most of these states lie slightly below the threshold. Therefore, these states are considered to be hadronic molecules composed of mesons or baryons. In 2022, the doubly charmed tetraquark $T_{cc}$ was reported by the LHCb experiment, which is considered to be composed of two heavy quarks and two light antiquarks, and located slightly below the $D{D}^{\ast }$ threshold. The observation motivates us to study the bound and resonant states of the doubly heavy tetraquarks as two meson systems. We employ the one boson exchange potential as an interaction between two mesons, where one free parameter has been determined to reproduce $T_{cc}$ reported by the LHCb experiment. In our previous work, bound states of $D^{(\ast )}{D}^{(\ast )}$ and $B^{(\ast )}{B}^{(\ast )}$ molecules were studied, where we respected the heavy quark spin symmetry (HQS). Using the same framework, we study not only bound but also resonant states with $J\le 2$ in this paper. Furthermore, we discuss the HQS partner structures of $T_{cc}$ and $T_{bb}$ obtained in our study by introducing the light cloud basis.

25 pages, 4 figures, 4 tables

References in corpus (33)

• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• An updated review of the new hadron states
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of structure in the $J/\psi$-pair mass spectrum
• Observation of an exotic narrow doubly charmed tetraquark
• Measurement of e^+e^- to pi^+pi^-J/psi Cross Section via Initial State Radiation at Belle
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• Evidence of a $J/\psi \Lambda$ structure and observation of excited ${\Xi }^{-}$ states in the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Observation of a near-threshold structure in the $K^{+}$ recoil-mass spectra in $e^{+}{e}^{-}\to K^{+}(D_s^{-}{D}^{\ast 0}+D_s^{\ast -}{D}^0)$
• QCD sum rules study of $QQ-\bar{u}\bar{d}$ mesons
• Recent development of complex scaling method for many-body resonances and continua in light nuclei
• Heavy-quark spin and flavour symmetry partners of the X(3872) revisited: what can we learn from the one boson exchange model?
• Signature of a doubly charm tetraquark pole in $D{D}^{\ast }$ scattering on the lattice
• Exotic $QQ\bar{q}\bar{q}$, $QQ\bar{q}\bar{s}$ and $QQ\bar{s}\bar{s}$ states
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• Analysis of the doubly-charmed tetraquark molecular states with the QCD sum rules
• Doubly Charmed Tetraquark $T_{cc}^{+}$ from Lattice QCD near Physical Point
• Stable double-heavy tetraquarks: spectrum and structure
• Newly observed exotic doubly charmed meson $T_{cc}^{+}$
• Double-heavy tetraquark states with heavy diquark-antiquark symmetry
• Hadronic molecule interpretation of $T_{cc}^{+}$ and its beauty-partners
• Complex scaling : physics of unbound light nuclei and perspective
• Double-charm tetraquark under the complex scaling method
• Analysis of the $X(3960)$ and related tetraquark molecular states via the QCD sum rules
• Investigating new type of doubly-charmed molecular tetraquarks composed of the charmed meson in $H$-doublet and the charmed meson in $T$-doublet
• A new group of doubly charmed molecule with $T$-doublet charmed meson pair
• Analysis of $T_{cc}$ and $T_{bb}$ based on the hadronic molecular model and their spin multiplets
• 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
• Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model
• Mass and decay width of $T_{ccs}$ from symmetries
• Investigation on the bottom analogs of the $T_{cc}^{+}$

Cited by in corpus (2)

• Physics of many-body resonances with complex scaling and applications to light unstable nuclei
• Possible ${\bar{D}}^{(\ast )}{\Xi }_{cc}^{(\ast )}$ and ${\Xi }_{cc}^{(\ast )}{\Xi }_{cc}^{(\ast )}$ molecules as superflavor partners of $T_{cc}$