Hidden-Bottom Pentaquarks

Abstract

The LHCb Collaboration has recently reported strong evidences of the existence of pentaquark states in the hidden-charm baryon sector, the so-called $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$ signals. Five-quark bound states in the hidden-charm sector were explored by us using, for the quark-quark interaction, a chiral quark model which successfully explains meson and baryon phenomenology, from the light to the heavy quark sector. We extend herein such study but to the hidden-bottom pentaquark sector, analyzing possible bound-states with spin-parity quantum numbers $J^P={\frac{1}{2}}^{\pm }$, ${\frac{3}{2}}^{\pm }$ and ${\frac{5}{2}}^{\pm }$, and in the $\frac{1}{2}$ and $\frac{3}{2}$ isospin sectors. We do not find positive parity hidden-bottom pentaquark states; however, several candidates with negative parity are found with dominant baryon-meson structures ${\Sigma }_b^{(\ast )}{\bar{B}}^{(\ast )}$. The calculated distances among any pair of quarks within the bound-state reflect that molecular-type bound-states are favored when only color-singlet configurations are considered in the coupled-channels calculation whereas compact pentaquarks, which are also deeply bound, can be found when hidden-color configurations are added. Finally, our findings resemble the ones found in the hidden-charm sector but, as expected, we find in the hidden-bottom sector larger binding energies and bigger contributions of the hidden-color configurations.

11 pages, 9 tables

References in corpus (19)

• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Constituent quark model study of the meson spectra
• Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• Quark-model study of few-baryon systems
• $D_s$ mesons with $DK$ and $D^{\ast }K$ scattering near threshold
• A Discussion on Triangle Singularities in the ${\Lambda }_b\to J/\psi K^{-}p$ Reaction
• Exotic meson-meson molecules and compact four--quark states
• Exotic $QQ\bar{q}\bar{q}$, $QQ\bar{q}\bar{s}$ and $QQ\bar{s}\bar{s}$ states
• Study of the $Z_c^{+}$ channel using lattice QCD
• Dynamical study of $\mathbf{QQ}-\bar{\mathbf{u}}\bar{\mathbf{d}}$ mesons
• Canonical description of the new LHCb resonances
• The S- and P-wave low-lying baryons in the chiral quark model
• Heavy-Quark Symmetry Partners of the Pc(4450) Pentaquark
• Threshold effects in P-wave bottom-strange mesons
• Effective field theory for the nucleon-quarkonium interaction
• $D\Xi$ and $D^{\ast }\Xi$ Molecular States from One Boson Exchange
• Hidden Bottom Pentaquark States with Spin 3/2 and 5/2
• A search for weakly decaying b-flavored pentaquarks

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