The Hydrogen Bond of QCD

Abstract

Using the Born-Oppenheimer approximation, we show that exotic resonances, X and Z, may emerge as QCD molecular objects made of colored two-quark lumps, states with heavy-light diquarks spatially separated from antidiquarks. With the same method we confirm that doubly heavy tetraquarks are stable against strong decays. Tetraquarks described here provide a new picture of exotic hadrons, as formed by the QCD analog of the hydrogen bond of molecular physics.

arXiv comment5 pages, 3 figures, comments and references added. Table 1 extended

References in corpus (23)

• Multiquark Resonances
• Diquark-Antidiquarks with Hidden or Open Charm and the Nature of X(3872)
• QCD forces and heavy quark bound states
• 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
• Study of doubly heavy tetraquarks in Lattice QCD
• Born-Oppenheimer Approximation for the XYZ Mesons
• Exotic tetraquark states with the $qq\bar{Q}\bar{Q}$ configuration
• Evidence for charm-bottom tetraquarks and the mass dependence of heavy-light tetraquark states from lattice QCD
• A Theory of X and Z Multiquark Resonances
• A $bb\bar{b}\bar{b}$ di-bottomonium at the LHC?
• The Search for Beauty-fully Bound Tetraquarks Using Lattice Non-Relativistic QCD
• Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
• The Born-Oppenheimer approximation in an effective field theory language
• A New Look at the $Y$ Tetraquarks and ${\Omega }_c$ Baryons in the Diquark Model
• Charmonium potential from full lattice QCD
• $ud\bar{b}\bar{b}$ tetraquark resonances with lattice QCD potentials and the Born-Oppenheimer approximation
• Doubly Charmed Tetraquarks in B_c and Xi_bc Decays
• The Dynamical Diquark Model: First Numerical Results
• Lattice QCD study of doubly-charmed strange baryons
• Would a Deeply Bound $b\bar{b}b\bar{b}$ Tetraquark Meson be Observed at the LHC?

Cited by in corpus (19)

• Spectrum of the fully-heavy tetraquark state $QQ{\bar{Q}}^{\prime }{\bar{Q}}^{\prime }$
• Analysis of the doubly-charmed tetraquark molecular states with the QCD sum rules
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• Novel approaches in Hadron Spectroscopy
• Mass spectrum of the hidden-charm pentaquarks in the compact diquark model
• The Hydrogen Bond of QCD in Doubly Heavy Baryons and Tetraquarks
• Analysis of the hidden-charm tetraquark mass spectrum with the QCD sum rules
• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
• The Dynamical Diquark Model: Fine Structure and Isospin
• Triply-heavy tetraquarks in an extended relativized quark model
• Two-particle contributions and nonlocal effects in the QCD sum rules for the axialvector tetraquark candidate $Z_c(3900)$
• Bottomoniumlike states in proton collisions: Fragmentation and resummation
• Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study
• Electromagnetic properties of the $T_{cc}^{+}$ molecular states
• Tetraquarks in the Born-Oppenheimer approximation
• Tetraquark-Jet Systems at the High-Luminosity LHC
• A short review on the compositeness of the $X(3872)$
• All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
• Assessing the validity of the Born-Oppenheimer approximation in potential models for doubly heavy hadrons