The Hydrogen Bond of QCD in Doubly Heavy Baryons and Tetraquarks

Abstract

In this paper we present in greater detail previous work on the Born-Oppenheimer approximation to treat the hydrogen bond of QCD, and add a similar treatment of doubly heavy baryons. Doubly heavy exotic resonances X and Z can be described as color molecules of two-quark lumps, the analogue of the H_2 molecule, and doubly heavy baryons as the analog of the H_2^+ ion, except that the two heavy quarks attract each other. We compare our results with constituent quark model and lattice QCD calculations and find further evidence in support of this upgraded picture of compact tetraquarks and baryons.

arXiv comment13 pages, 5 figures. Minor corrections and one reference included. To appear in Phys Rev D

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Cited by in corpus (32)

• An updated review of the new hadron states
• Observation of an exotic narrow doubly charmed tetraquark
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• A study of $cc\bar{c}\bar{c}$ tetraquark decays in 4 muons and in $D^{(\ast )}{\bar{D}}^{(\ast )}$ at LHC
• $T_{cc}^{+}$ and its partners
• Can we understand the decay width of the $T_{cc}^{+}$ state?
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• $T_{cc}^{+}(3875)$ relevant $D{D}^{\ast }$ scattering from $N_f=2$ lattice QCD
• Search for $bb\bar{b}\bar{b}$ tetraquark decays in 4 muons, $B^{+}{B}^{-}$, $B^0{\bar{B}}^0$ and $B_s^0{\bar{B}}_s^0$ channels at LHC
• Doubly heavy tetraquarks in an extended chromomagnetic model
• Tetraquark bound states in constituent quark models: benchmark test calculations
• Mass spectrum of the hidden-charm pentaquarks in the compact diquark model
• Exotic Tetraquark states with two $\bar{b}$-quarks and $J^P=0^{+}$ and $1^{+}$ $B_s$ states in a nonperturbatively-tuned Lattice NRQCD setup
• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
• Importance of meson-meson and of diquark-antidiquark creation operators for a $\bar{b}\bar{b}ud$ tetraquark
• The quasi-fission phenomeonon of double charm $T_{cc}^{+}$ induced by nucleon
• Heavy- and light-flavor symmetry partners of the $T_{cc}^{+}(3875)$, the $X(3872)$ and the $X(3960)$ from light-meson exchange saturation
• A new group of doubly charmed molecule with $T$-doublet charmed meson pair
• Doubly heavy tetraquark states in the constituent quark model using diffusion Monte Carlo method
• Effective QCD string and doubly heavy baryons
• Doubly heavy tetraquark bound and resonant states
• Masses of doubly heavy tetraquarks $QQ\bar{n}\bar{q}$ with $J^P=1^{+}$
• Possible molecular states from interactions of charmed baryons
• Tetraquarks in the Born-Oppenheimer approximation
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• Structure of open-flavour four-quark states in the charm and bottom region
• A short review on the compositeness of the $X(3872)$
• The Pentaquark Spectrum from Fermi Statistics
• QCD, from its inception to its stubbornly unsolved problems
• Quark exchange effects in single flavored dibaryons
• $\lambda$ and $\rho$ Regge trajectories for the pentaquark $P_{cc\bar{c}bb}$ in the diquark-triquark picture
• Assessing the validity of the Born-Oppenheimer approximation in potential models for doubly heavy hadrons