Triquark structure and isospin symmetry breaking in exotic Ds mesons

Abstract

The color anti-triplet triquark $q\bar{q}\bar{q}$ is considered as a compact component in the tetraquark structure $cq\bar{q}\bar{q}$ of exotic $D_s$ mesons. We discuss the mass spectrum and the flavor mixing of the triquarks by using the instanton induced interaction and the one-gluon exchange potentials. As a characteristic property of the triquark, we investigate the isospin violation. It is shown that the flavor $\bar{3}$ (isosinglet) and $6$ (isotriplet) states may be strongly mixed and then are identified with $D_s(2632)$.

References in corpus (27)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Diquark-Antidiquarks with Hidden or Open Charm and the Nature of X(3872)
• Observation of a Narrow Meson Decaying to Ds+pi0 at a Mass of 2.32 GeV/c^2
• The New Heavy Mesons: A Status Report
• 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
• Implications of a DK Molecule at 2.32 GeV
• Observed D_s(2317) and tentative D(2100-2300) as the charmed cousins of the light scalar nonet
• Observation of the DsJ(2317) and DsJ(2457) in B decays
• A Diquark-Triquark Model for the KN Pentaquark
• B Decays as Spectroscope for Charmed Four-quark States
• A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632)
• Description of the $D_s^{\ast }(2320)$ resonance as the $D\pi$ atom
• Spin-Orbit and Tensor Forces in Heavy-quark Light-quark Mesons: Implications of the New Ds state at 2.32 GeV
• First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+
• Radial Excitations of Heavy Mesons
• Is the anomalous decay ratio of D_{sJ}(2632) due to isospin breaking?
• Color Non-Singlet Spectroscopy
• $D_{sJ}^{+}(2632)$: An Excellent Candidate of Tetraquarks
• The colour triplet qqqbar cluster and pentaquark models
• Instanton induced quark dynamics and the pentaquark
• Isospin quantum number of D_{s0}^+(2317)
• Triquark correlations and pentaquarks in a QCD sum rule approach
• Effects of Instantons on the Excited Baryons and Two-Nucleon Systems
• Effects of Instanton Induced Interaction on the Pentaquarks
• A quark model analysis of the charge symmetry breaking in nuclear force

Cited by in corpus (4)

• Strong decays of heavy-light mesons in a chiral quark model
• Λ_{c} enhancement from strongly coupled quark-gluon plasma
• Regge trajectories for the triply heavy triquarks
• Non-perturbative Analysis of Various Mass Generation by Gluonic Dressing Effect with the Schwinger-Dyson Formalism in QCD