Chiral doublers of heavy-light baryons

Abstract

We discuss the consequences of the chiral doubling scenario for baryons built of heavy and light quarks. In particular, we use the soliton description for baryons, demonstrating why each heavy-light baryon should be accompanied by the opposite parity partner. Our argumentation holds both for ordinary baryons and for exotic heavy pentaquarks which are required by the symmetries of QCD to appear in parity doublets, seperated by the mass shift of the chiral origin. Interpreting the recently observed by BaBaR, CLEO and Belle charmed mesons with assignment $(0^{+},1^{+})$ as the chiral partners of known $D$ and $D^{\ast }$ mesons, allows us to estimate the parameters of the mesonic effective lagrangian, and in consequence, estimate the masses of ground states and excited states of both parities. In particular, we interpret the state recently reported by the H1 experiment at HERA as a chiral partner ${\tilde{\Theta }}_c^0(3099)$ of yet undiscovered ground state pentaquark ${\Theta }_c^0(2700)$.

10 pages, in v2 some typos corrected, references added

References in corpus (14)

• Diquarks and Exotic Spectroscopy
• Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2
• Observation of a Narrow Resonance of Mass 2.46 GeV/c^2 Decaying to D_s^*+ pi^0 and Confirmation of the D_sJ^* (2317) State
• Chiral Multiplets of Heavy-Light Mesons
• Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Observation of the DsJ(2317) and DsJ(2457) in B decays
• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• Understanding $D_{sJ}(2317)$
• Evidence for formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• Observation of a Narrow Meson Decaying to Ds pi0 gamma at a Mass of 2.458 GeV/c^2
• Pentaquark in the Skyrme Model
• Is Theta+(1540) a Kaon--Skyrmion Resonance?
• One-loop weak corrections to the $b\bar{b}$ cross section at TeV energy hadron colliders

Cited by in corpus (15)

• Pentaquark and Tetraquark states
• Single heavy baryons with chiral partner structure in a three-flavor chiral model
• The family of strange multiquarks related to the Ds(2317) and Ds(2457)
• Analysis of ${\Lambda }_c(2595)$, ${\Lambda }_c(2625)$, ${\Lambda }_b(5912)$, ${\Lambda }_b(5920)$ based on a chiral partner structure
• Doubly heavy baryons with chiral partner structure
• QCD sum rules for the anti-charmed pentaquark
• Light-Front Approach for Pentaquark Strong Decays
• 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
• Holographic charm and bottom pentaquarks I: Mass spectra with spin effects
• QCD Sum Rule Study for a Possible Charmed Pentaquark Θc(3250)
• Are the anti-charmed and bottomed pentaquarks molecular heptaquarks?
• Chiral partner structure of heavy baryons from the bound state approach with hidden local symmetry
• Chiral effective Lagrangian for heavy-light mesons from QCD
• Heavy Pentaquarks in the Diquark Model and the Large N_c Expansion