Heavy Holographic Exotics: Tetraquarks as Efimov States

Abstract

We provide a holographic description of non-strange multiquark exotics as compact topological molecules by binding heavy-light mesons to a tunneling configuration in D8-D$\bar{8}$ that is homotopic to the vacuum state with fixed Chern-Simons number. In the tunneling process, the heavy-light mesons transmute to fermions. Their binding is generic and arises from a trade-off between the dipole attraction induced by the Chern-Simons term and the U(1) fermionic repulsion. In the heavy quark limit, the open-flavor tetraquark exotics $QQ\bar{q}\bar{q}$ and $\bar{Q}\bar{Q}qq$, emerge as bound Efimov states in a degenerate multiplet $I{J}^{\pi }=(00^{+},01^{+})$ with opposite intrinsic Chern-Simons numbers $\pm \frac{1}{2}$. The hidden-flavor tetraquark exotics such as $Q\bar{Q}q\bar{q}$, $QQ\bar{Q}\bar{q}$ and $QQ\bar{Q}\bar{Q}$ as compact topological molecules are unbound. Other exotics are also discussed.

16 pages, 13 figures

References in corpus (40)

• Heavy quarkonium: progress, puzzles, and opportunities
• Pentaquark and Tetraquark states
• Exploring improved holographic theories for QCD: Part II
• Heavy Baryons in a Quark Model
• Charmonium
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• Hadro-Charmonium
• Multiquark States
• Emergence of a complete heavy-quark spin symmetry multiplet: seven molecular pentaquarks in light of the latest LHCb analysis
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Is X(3872) a molecule?
• Structure of Vector Mesons in Holographic Model with Linear Confinement
• Form Factors and Wave Functions of Vector Mesons in Holographic QCD
• Could the near-threshold $XYZ$ states be simply kinematic effects?
• Evidence for charm-bottom tetraquarks and the mass dependence of heavy-light tetraquark states from lattice QCD
• Interpretation of the Narrow $J/\psi p$ Peaks in ${\Lambda }_b\to J/\psi p{K}^{-}$ Decay in the Compact Diquark Model
• Interpretation of the LHCb Pc(4312) Signal
• Discovery potential of stable and near-threshold doubly heavy tetraquarks at the LHC
• On LHCb pentaquarks as a baryon-psi(2S) bound state -- prediction of isospin 3/2 pentaquarks with hidden charm
• Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
• Few-body quark dynamics for doubly-heavy baryons and tetraquarks
• Stability of tetrons
• Electromagnetic Baryon Form Factors from Holographic QCD
• Emerging Holography
• The hidden charm pentaquarks are the hidden color-octet $uud$ baryons?
• Supersymmetry Across the Light and Heavy-Light Hadronic Spectrum II
• Excited mesons, baryons, glueballs and tetraquarks: Predictions of the Holography Inspired Stringy Hadron model
• Holographic heavy-light mesons from non-Abelian DBI
• Baryons and the Chern-Simons term in holographic QCD with three flavors
• Heavy Exotic Molecules with Charm and Bottom
• Remarks on Heavy-Light Mesons from AdS/CFT
• Holographic heavy-baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Baryon and chiral symmetry breaking in holographic QCD
• A holographic description of heavy-flavoured baryonic matter decay involving glueball
• Holographic three flavor baryon in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Heavy Exotic Molecules
• On a possibility of exotic heavy baryons

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