Regge behaviors in orbitally excited spectroscopy of charmed and bottom baryons

Abstract

Stimulated by recent progress made by the LHCb Collaboration in discoveries of new bottom baryons, e.g., the ${\Xi }_b(6227{)}^{-}$ and the ${\Sigma }_b(6097{)}^{\pm }$, we re-examine the orbitally excited spectrum of the charmed and bottom baryons using Regge approach in the heavy quark-diquark picture. The results indicate that the spin-averaged mass spectrum of the orbitally-excited charmed and bottom baryons can be described by a linear Regge relation, which is derived from the rotating QCD string model. By giving further mass-splitting analysis of spin-dependent interactions, we explain the baryons ${\Xi }_b(6227{)}^{-}$ and the ${\Sigma }_b(6097{)}^{\pm }$,and the ${\Sigma }_c(2800)$ and ${\Xi }_c^{\prime }(2930)$ to be the $1P$%-wave baryons, all with the spin-parity $J^P=3/2^{-}$ preferably. Mass prediction of the bottom baryon ${\Xi }_b$ in its P- and D-waves are presented, providing clues for the coming experiments like the LHCb to find them.

The Latex file with 11 pages is updated in a form with 15 pages, with more systematic calculations and supporting evidences from experimental data added. A discussions and a more appendix C added and appendixes A and C updated

References in corpus (20)

• Heavy Baryons in a Quark Model
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• Observation of a new ${\Xi }_b^{-}$ resonance
• Structure of charmed baryons studied by pionic decays
• Observation of two resonances in the ${\Lambda }_b^0{\pi }^{\pm }$ systems and precise measurement of ${\Sigma }_b^{\pm }$ and ${\Sigma }_b^{\ast \pm }$ properties
• Observation of new resonances in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ system
• Role of newly discovered ${\Xi }_b(6227{)}^{-}$ for constructing excited bottom baryon family
• Interpretation of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ and ${\Xi }_b(6227{)}^{-}$ states as the $P$-wave bottom baryons
• Assigning the newly reported ${\Sigma }_b(6097)$ as a $P$-wave excited state and predicting its partners
• Identifying the ${\Xi }_b(6227)$ and ${\Sigma }_b(6097)$ as $P$-wave bottom baryons of $J^P=3/2^{-}$
• Identification of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ baryons from their strong decays
• Structure of the ${\Xi }_b(6227{)}^{-}$ Resonance
• Strong decays of the ${\Xi }_b(6227)$ as a ${\Sigma }_b\bar{K}$ molecule
• Determination of the quantum numbers of ${\Sigma }_b(6097{)}^{\pm }$ via their strong decays
• Evidence of a structure in ${\bar{K}}^0{\Lambda }_c^{+}$ consistent with a charged ${\Xi }_c(2930{)}^{+}$, and updated measurement of ${\bar{B}}^0\to {\bar{K}}^0{\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ at Belle
• Strange baryons with two heavy quarks
• Regge-like relation and a universal description of heavy-light systems
• Quantizing the rotating string with massive endpoints

Cited by in corpus (14)

• An updated review of the new hadron states
• Observation of a new ${\Xi }_b^0$ state
• Mass-spectra of singly, doubly, and triply bottom baryons
• Mass Spectra and Decay Properties of Singly Heavy Bottom-Strange Baryons
• Strong decays of the low-lying bottom strange baryons
• Canonical interpretations of the newly observed ${\Xi }_c(2923{)}^0$, ${\Xi }_c(2939{)}^0$ and ${\Xi }_c(2965{)}^0$ resonances
• Structure of the meson Regge trajectories
• Spectra and decay properties of ${\Lambda }_b$ and ${\Sigma }_b$ baryons
• A Mixing Coupling Scheme for Spectra of Singly Heavy Baryons with Spin-1 Diquarks in P-waves
• Revisiting the pion Regge trajectories
• Mass spectra of doubly heavy tetraquarks in diquark-antidiquark picture
• The newly observed ${\Lambda }_b(6072{)}^0$ structure and its $\rho -$mode nonstrange partners
• Magnetic moment of the ${\Xi }_b(6227)$ as a molecular pentaquark state
• Toward establishing the low-lying $P$-wave excited ${\Sigma }_c$ baryon states