Charmed bottom baryon spectroscopy from lattice QCD

Abstract

We calculate the masses of baryons containing one, two, or three heavy quarks using lattice QCD. We consider all possible combinations of charm and bottom quarks, and compute a total of 36 different states with $J^P={\frac{1}{2}}^{+}$ and $J^P={\frac{3}{2}}^{+}$. We use domain-wall fermions for the up, down, and strange quarks, a relativistic heavy-quark action for the charm quarks, and nonrelativistic QCD for the bottom quarks. Our analysis includes results from two different lattice spacings and seven different pion masses. We perform extrapolations of the baryon masses to the continuum limit and to the physical pion mass using $SU(4|2)$ heavy-hadron chiral perturbation theory including $1/m_Q$ and finite-volume effects. For the 14 singly heavy baryons that have already been observed, our results agree with the experimental values within the uncertainties. We compare our predictions for the hitherto unobserved states with other lattice calculations and quark-model studies.

41 pages, 19 figures

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• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
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• Lattice QCD investigation of a doubly-bottom $\bar{b}\bar{b}ud$ tetraquark with quantum numbers $I(J^P)=0(1^{+})$
• P-wave charmed baryons from QCD sum rules
• Spectrum of light- and heavy-baryons
• Mass spectra and Regge trajectories of ${\Lambda }_c^{+}$, ${\Sigma }_c^0$, ${\Xi }_c^0$ and ${\Omega }_c^0$ Baryons
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• Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model
• Spectroscopy of doubly-charmed baryons from lattice QCD
• Implications of Heavy Quark-Diquark Symmetry for Excited Doubly Heavy Baryons and Tetraquarks
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• Isospin splittings in baryons with two heavy quarks
• Deuteron-like states composed of two doubly charmed baryons
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }q}\to {\Lambda }_{Q^{\prime }}$ Weak Decays
• Constituent-quark model description of triply heavy-baryon nonperturbative lattice QCD data
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• Lattice QCD with $N_f=2+1+1$ domain-wall quarks
• Advances in machine-learning-based sampling motivated by lattice quantum chromodynamics
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• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }}\to {\Sigma }_{Q^{\prime }}$ Weak Decays
• The Status of ${\Xi }_{cc}^{++}$ Baryon: investigating quark-diquark model
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• Quark-hadron duality at work: lifetimes of bottom baryons
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• Fate of the doubly heavy spin$-3/2$ baryons in a dense medium
• Mass spectra, wave functions and mixing effects of the $(bcq)$ baryon
• Investigation of Doubly Heavy Tetraquark Systems using Lattice QCD