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.

16 pages, 14 Figures, 10 Tables

References in corpus (24)

• Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• Masses of tetraquarks with two heavy quarks in the relativistic quark model
• QCD sum rules study of $QQ-\bar{u}\bar{d}$ mesons
• Exotic tetraquark states with the $qq\bar{Q}\bar{Q}$ configuration
• Lattice QCD investigation of a doubly-bottom $\bar{b}\bar{b}ud$ tetraquark with quantum numbers $I(J^P)=0(1^{+})$
• Exotic meson-meson molecules and compact four--quark states
• Exotic $QQ\bar{q}\bar{q}$, $QQ\bar{q}\bar{s}$ and $QQ\bar{s}\bar{s}$ states
• Stable multiquark states with heavy quarks in a diquark model
• Doubly-heavy tetraquarks
• Including heavy spin effects in the prediction of a $\bar{b}\bar{b}ud$ tetraquark with lattice QCD potentials
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• BB Potentials in Quenched Lattice QCD
• Spectroscopy, lifetime and decay modes of the $T_{bb}^{-}$ tetraquark
• Dynamical study of $\mathbf{QQ}-\bar{\mathbf{u}}\bar{\mathbf{d}}$ mesons
• Charmed Exotics in Heavy Ion Collisions
• Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions
• Four-quark Bound States in Chiral SU(3) Quark Model
• Exotic $bc\bar{q}\bar{q}$ four-quark states
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks
• Magnetic moments of the doubly charged axial-vector $T_{cc}^{++}$ states
• Excitation energy spectra of the Lambda_c and Lambda_b baryons in a finite-size diquark model
• Mixing angles between the tetraquark states with two heavy quarks within QCD sum rules

Cited by in corpus (2)

• 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