Prediction of exotic doubly charmed baryons within chiral effective field theory

Abstract

In this work we study the possible QCD exotic states in the doubly charmed baryon sector. Within chiral effective theory, it is predicted that several excited baryons result from the $S$-wave scattering of ground-state doubly charmed baryons (${\Xi }_{cc}^{++},{\Xi }_{cc}^{+},{\Omega }_{cc}^{+}$) and light pseudoscalar mesons ($\pi ,K,\eta$). The excited doubly charmed baryons can be classified by the strangeness ($S$) and isospin ($I$) quantum numbers. Two of the excited states are clearly exotic, in the sense that they cannot be explained by the conventional baryons with three quarks, since their quantum numbers are $(S,I)=(1,0)$ and $(-1,1)$. Similar to the charmed scalar meson $D_{s0}^{\ast }(2317)$ in $DK$ scattering and the hyperon $\Lambda (1405)$ in $\bar{K}N$ scattering, one bound state below the ${\Xi }_{cc}\bar{K}$ threshold is predicted in the $(S,I)=(-1,0)$ channel. In addition, two resonant structures are found in the ${\Xi }_{cc}\pi ,{\Xi }_{cc}\eta$ and ${\Omega }_{cc}K$ coupled-channel scattering with $(S,I)=(0,1/2)$. The corresponding pole positions and coupling strengths of the excited doubly charmed baryons are given. The scattering lengths of the ground-state doubly charmed baryons and light pseudoscalar mesons are also predicted. The current study may provide useful guides for future experimental measurements and lattice simulations.

11 pages, 3 figures, 3 tables. To match the published version

References in corpus (11)

• Multiquark Resonances
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• Observation of the doubly charmed baryon ${\Xi }_{cc}^{++}$
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• Magnetic moments of the doubly charmed and bottomed baryons
• Establishing low-lying doubly charmed baryons
• The masses and axial currents of the doubly charmed baryons
• Quark-level analogue of nuclear fusion with doubly-heavy baryons

Cited by in corpus (19)

• Pentaquark and Tetraquark states
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• A survey of heavy-heavy hadronic molecules
• Weak Decays of Doubly Heavy Baryons: Multi-body Decay Channels
• Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model
• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }q}\to {\Lambda }_{Q^{\prime }}$ Weak Decays
• Analysis of the semileptonic and nonleptonic two-body decays of the double heavy charm baryon states ${\Xi }_{cc}^{++},{\Xi }_{cc}^{+}$ and ${\Omega }_{cc}^{+}$
• Sum rules for $CP$ asymmetries of charmed baryon decays in the $SU(3{)}_F$ limit
• Light-Cone Sum Rules Analysis of ${\Xi }_{Q{Q}^{\prime }}\to {\Sigma }_{Q^{\prime }}$ Weak Decays
• Light pseudoscalar meson and heavy meson scattering lengths to $\mathcal{O}(p^4)$ in heavy meson chiral perturbation theory
• QCD sum rules analysis of weak decays of doubly heavy baryons: the $b\to c$ processes
• Doubly charmed pentaquark states in QCD sum rules
• Chiral effective Lagrangian for doubly charmed baryons up to $\mathcal{O}(q^4)$
• Doubly-Charm and Doubly-Bottom Pentaquark molecular States via the QCD sum rules
• Prediction of five-flavored pentaquarks
• The ${\Omega }_{cc}$ resonances with negative parity in the chiral constituent quark model
• Doubly-charmed pentaquark states in a mass splitting model
• The study of doubly charmed pentaquark $cc\bar{q}qq$ with the SU(3) symmetry