Doubly heavy baryons with chiral partner structure

Abstract

The spectrum and dominant strong decay properties of the doubly heavy baryons are revisited by using a chiral effective model with chiral partner structure. By regarding the doubly heavy baryons in the ground states and light angular momentum $j_l=1/2$ sector of the first orbitally excited states as chiral partners to each other, we estimate the mass splitting of the chiral partners which arises from the spontaneous breaking of chiral symmetry to be about $430$ MeV for baryons including an unflavored light quark and about $350$ MeV for that including a strange quark. We point out that, similar to the heavy-light meson sector, the intermultiplet decay from a baryon with negative parity to its chiral partner and a pion is determined by the mass splitting throught the generalized Goldberger-Treiman relation. Furthermore, the isospin violating decay of ${\Omega }_{cc}$ baryon, $((1/2{)}^{-},(3/2{)}^{-}{)}_s\to ((1/2{)}^{+},(3/2{)}^{+}{)}_s+{\pi }^0$ through the $\eta$-${\pi }^0$ mixing is the dominant decay channel of the doubly heavy baryons including a strange quark.

4 pages

References in corpus (8)

• Big-Bang Nucleosynthesis
• Charmed bottom baryon spectroscopy from lattice QCD
• Baryons with two heavy quarks: Masses, production, decays, and detection
• Isospin splittings of doubly heavy baryons
• The masses and axial currents of the doubly charmed baryons
• Mass degeneracy of the heavy-light mesons with chiral partner structure in the half-skyrmion phase
• Fate of charmed mesons near chiral symmetry restoration in hot matter
• Chiral partner structure of heavy baryons from the bound state approach with hidden local symmetry

Cited by in corpus (16)

• A review of the open charm and open bottom systems
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Implications of Heavy Quark-Diquark Symmetry for Excited Doubly Heavy Baryons and Tetraquarks
• Single heavy baryons with chiral partner structure in a three-flavor chiral model
• Chiral partner structure of doubly heavy baryons with heavy quark spin-flavor symmetry
• Doubly heavy tetraquark multiplets as heavy antiquark-diquark symmetry partners of heavy baryons
• Analysis of ${\Lambda }_c(2595)$, ${\Lambda }_c(2625)$, ${\Lambda }_b(5912)$, ${\Lambda }_b(5920)$ based on a chiral partner structure
• Chiral partner structure of light nucleons in an extended parity doublet model
• Molecular ${\Omega }_{cc}$ , ${\Omega }_{bb}$ and ${\Omega }_{bc}$ states
• Degeneracy of doubly heavy baryons from heavy quark symmetry
• Three-Body Decay of ${\Lambda }_c^{\ast }(2595)$ and ${\Lambda }_c^{\ast }(2625)$ with the Inclusion of Direct Two-Pion Coupling
• Production of double charmed baryons with the excited heavy diquark at LHC
• Mass spectra of double-bottom baryons
• Fate of the doubly heavy spin$-3/2$ baryons in a dense medium
• Axial anomaly effect on three-quark and five-quark singly heavy baryons
• The production of excited states of doubly heavy baryons at the Large Hadron Collider