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.

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

References in corpus (15)

• Multiquark Resonances
• Heavy Baryons in a Quark Model
• 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
• Baryons with two heavy quarks: Masses, production, decays, and detection
• Exotic tetraquark states with the $qq\bar{Q}\bar{Q}$ configuration
• Static properties and semileptonic decays of doubly heavy baryons in a nonrelativistic quark model
• Lattice QCD investigation of a doubly-bottom $\bar{b}\bar{b}ud$ tetraquark with quantum numbers $I(J^P)=0(1^{+})$
• A Theory of X and Z Multiquark Resonances
• The Born-Oppenheimer approximation in an effective field theory language
• Bethe-Salpeter equation for doubly heavy baryons in the covariant instantaneous approximation
• The Hydrogen Bond of QCD
• Would a Deeply Bound $b\bar{b}b\bar{b}$ Tetraquark Meson be Observed at the LHC?

Cited by in corpus (31)

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• $T_{cc}^{+}(3875)$ relevant $D{D}^{\ast }$ scattering from $N_f=2$ lattice QCD
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• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
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• 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
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• Effective QCD string and doubly heavy baryons
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• Masses of doubly heavy tetraquarks $QQ\bar{n}\bar{q}$ with $J^P=1^{+}$
• Tetraquarks in the Born-Oppenheimer approximation
• Possible molecular states from interactions of charmed baryons
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• The Pentaquark Spectrum from Fermi Statistics
• A short review on the compositeness of the $X(3872)$
• QCD, from its inception to its stubbornly unsolved problems
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• Assessing the validity of the Born-Oppenheimer approximation in potential models for doubly heavy hadrons