Prediction of charmed-bottom pentaquarks in quark model

Abstract

Inspired by the fully heavy tetraquark states reported by the LHCb, ATLAS and CMS Collaborations, we perform a systemical investigation of the low-lying fully heavy pentaquark systems composed of charm and bottom quarks (anti-quark) in the chiral quark model. With the help of the channel-coupling, we obtain several fully heavy pentaquark candidates, which are $cccc\bar{b}$ and $bbbb\bar{c}$ systems with $J^P=1/2^{-}$ and $3/2^{-}$, $cccb\bar{c}$, $bbbc\bar{b}$, $cccb\bar{b}$ and $bbbc\bar{c}$ systems with $J^P=5/2^{-}$. The binding energies of these states are all below 10 MeV and the root mean square (RMS) are around 1.8 fm, which indicates that these states are likely to be molecular states. These predicted exotic states may provide new ideas for experimental searches and we expect more experimental and theoretical researches to study and understand the fully heavy states in future.

12 pages, 3 figures

References in corpus (20)

• Nuclear Force from Lattice QCD
• Constituent quark model study of the meson spectra
• Quark-model study of few-baryon systems
• Heavy tetraquarks in the relativistic quark model
• Nonrelativistic Treatment of Fully-Heavy Tetraquarks as Diquark-Antidiquark States
• Tetraquark state $X(6900)$ and the interaction between diquark and antidiquark
• Fully-heavy tetraquark spectroscopy in the relativistic quark model
• Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data
• Fully-heavy tetraquark production by $\gamma \gamma$ interactions in hadronic collisions at the LHC
• Very heavy flavored dibaryons
• Strongly Bound Dibaryon with Maximal Beauty Flavor from Lattice QCD
• Spectrum of the S-wave fully-heavy tetraquark states
• All-charm tetraquark in front form dynamics
• Spectrum of $cc\bar{b}\bar{b}$, $bc\bar{c}\bar{c}$, and $bc\bar{b}\bar{b}$ Tetraquark States in the Dynamical Diquark Model
• Diffusion Monte Carlo calculations of fully-heavy compact hexaquarks
• X(6200) as a compact tetraquark in the QCD string model
• The bosonic algebraic approach applied to the $[QQ][\bar{Q}\bar{Q}]$ tetraquarks
• Fully-heavy hexaquark states via the QCD sum rules
• Searching for fully-heavy tetraquark states in QCD moment sum rules
• Fully heavy multiquarks

Cited by in corpus (1)

• Probing the hidden-bottom pentaquark resonances in photonuclear bottomonium production near threshold: differential observables