Observed ${\Omega }_b$ spectrum and meson-baryon molecular states

Abstract

We observe that four peaks seen in the high energy part of the ${\Omega }_b$ spectrum of the recent LHCb experiment are in remarkable agreement with predictions made for molecular ${\Omega }_b$ states stemming from the meson-baryon interaction, with an approach that applied to the ${\Omega }_c$ states gave rise to three states in good agreement with experiment in masses and widths. While the statistical significance of the peaks prevents us from claims of states at the present time, the agreement found should be an incentive to look at this experiment with increased statistics to give an answer to this suggestive idea.

arXiv comment8 pages, 2 tables; V2: New section and discussion added, references added, version to appear in Phys. Rev. D

References in corpus (52)

• Heavy Quark Symmetry
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Hidden Local Symmetry at Loop -- A New Perspective of Composite Gauge Boson and Chiral Phase Transition
• Heavy Baryons in a Quark Model
• A review of the open charm and open bottom systems
• Baryon spectroscopy
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Observation of five new narrow ${\Omega }_c^0$ states decaying to ${\Xi }_c^{+}{K}^{-}$
• Heavy baryons
• Progress Toward Understanding Baryon Resonances
• Spectrum of heavy baryons in the quark model
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Heavy quark spin symmetric molecular states from ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ and other coupled channels in the light of the recent LHCb pentaquarks
• Faddeev study of heavy baryon spectroscopy
• Masses of heavy baryons in the relativistic quark model
• Hidden gauge formalism for the radiative decays of axial-vector mesons
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• Precise predictions of charmed-bottom hadrons from lattice QCD
• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• The Quark Model and $b$ Baryons
• Bottom Baryons
• P-wave charmed baryons from QCD sum rules
• Scattering lengths of Nambu-Goldstone bosons off $D$ mesons and dynamically generated heavy-light mesons
• On the nature of the newly discovered ${\Omega }_c^0$ states
• QCD sum rule calculation for P-wave bottom baryons
• Excited State Mass spectra and Regge trajectories of Bottom Baryons
• Hidden beauty molecules within the local hidden gauge approach and heavy quark spin symmetry
• D-wave charmed and bottomed baryons from QCD sum rules
• Molecular ${\Omega }_c$ states generated from coupled meson-baryon channels
• Masses of Light and Heavy Mesons and Baryons: A Unified Picture
• Dynamically generated $J^P=1/2^{-}(3/2^{-})$ singly charmed and bottom heavy baryons
• Quark model description of the Λ_c(2940)^+ as a molecular D^*N state and the possible existence of the Λ_b(6248)
• Role of newly discovered ${\Xi }_b(6227{)}^{-}$ for constructing excited bottom baryon family
• Strong and radiative decays of the low-lying $D$-wave singly heavy baryons
• A meson-baryon molecular interpretation for some ${\Omega }_c$ excited baryons
• Searching for possible ${\Omega }_c-$like molecular states from ${\Xi }_c^{\ast }\bar{K}/{\Xi }_c{\bar{K}}^{\ast }/{\Xi }_c^{\prime }{\bar{K}}^{\ast }$ interaction
• SU(3) mass-splittings of heavy-baryons in QCD
• Interpretation of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ and ${\Xi }_b(6227{)}^{-}$ states as the $P$-wave bottom baryons
• The S- and P-wave low-lying baryons in the chiral quark model
• Assigning the newly reported ${\Sigma }_b(6097)$ as a $P$-wave excited state and predicting its partners
• Investigating the excited ${\Omega }_c^0$ states through ${\Xi }_{c}K$ and ${\Xi }_c^{{}^{\prime }}K$ decay channels
• Identifying the ${\Xi }_b(6227)$ and ${\Sigma }_b(6097)$ as $P$-wave bottom baryons of $J^P=3/2^{-}$
• $D$-wave heavy baryons of the $SU(3)$ flavor $6_F$
• Single heavy baryons with chiral partner structure in a three-flavor chiral model
• ${\Xi }_c$ and ${\Xi }_b$ excited states within a ${\mathrm{SU}(6)}_{\mathrm{lsf}}\times$HQSS model
• Strong and radiative decays of DΞmolecular state and newly observed ${\Omega }_c$ states
• Prospects for observing the lowest-lying odd-parity ${\Sigma }_c$ and ${\Sigma }_b$ baryons
• Identification of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ baryons from their strong decays
• $D\Xi$ and $D^{\ast }\Xi$ Molecular States from One Boson Exchange
• Molecular ${\Omega }_b$ states
• ${\Omega }_c$ excited states within a ${\mathrm{SU}(6)}_{\mathrm{lsf}}\times$HQSS model
• Strong decays of the newly observed narrow ${\Omega }_b$ structures

Cited by in corpus (11)

• An updated review of the new hadron states
• Masses and radiative decay widths of S- and P-wave singly-, doubly- and triply-heavy charm and bottom baryons
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Molecular ${\Omega }_{cc}$ , ${\Omega }_{bb}$ and ${\Omega }_{bc}$ states
• Interpretation of excited ${\Omega }_b$ signals
• The molecular nature of some exotic hadrons
• Decay widths and mass spectra of single bottom baryons
• Identifying the ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ as $D$-wave bottom baryons
• Toward establishing the low-lying $P$-wave excited ${\Sigma }_c$ baryon states
• Possible molecules of triple-heavy pentaquarks within the extended local hidden gauge formalism