Pentaquark states in a chiral potential

Abstract

We discuss a possible interpretation for the pentaquark baryon ${\Theta }^{+}$ which has an exotic quantum number of strangeness $S=+1$. The role of the pion which modifies the structure of single-particle levels of quarks is examined. When the pion field is sufficiently strong, the ground state of five quarks for ${\Theta }^{+}$ acquires positive parity. If this is the case, an excited state may appear slightly above the ground state with negative parity.

7 pages, 3 figures. Some errors in $s$ and $\bar{s}$ configurations are corrected

Cited by in corpus (59)

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• Lattice study of exotic S=+1 baryon
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• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
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• Parity of ${\Theta }^{+}$(1540) from QCD sum rules
• Penta-quark baryon in anisotropic lattice QCD
• Exotic Theta^+ baryon production induced by a photon and a pion
• Is the Theta+ a K pi N bound state?
• Spectroscopy of pentaquark states
• Pentaquark Theta+, constituent quark structures, and prediction of charmed Theta(c)^0 and bottomed Theta(b)^+
• Search for the possible S=+1 Pentaquark states in Quenched Lattice QCD
• Determining the ${\Theta }^{+}$ quantum numbers through the $K^{+}p\to {\pi }^{+}{K}^{+}n$ reaction
• Magnetic Moment of The ${\Theta }^{+}$ Pentaquark State
• Magnetic moments of antidecuplet pentaquarks
• Theta^+ baryon production in KN and NN reactions
• The theta^+ baryon in soliton models: large Nc QCD and the validity of rigid-rotor quantization
• Properties of baryon anti-decuplet
• Pentaquark ${\Theta }^{+}$ production from the reaction $\gamma p\to {\pi }^{+}{K}^{-}{\Theta }^{+}$
• Pentaquarks: Review on Models and Solitonic Calculations of Antidecuplet Magnetic Moments
• Decay of Theta+ in a quark model
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• Present status on experimental search for pentaquarks
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• Spin observables and the determination of the parity of ${\Theta }^{+}$ in photoproduction reactions
• A comprehensive search for the Θ^+ pentaquark on the lattice
• A theory of baryon resonances at large N_c
• Axial vector tetraquark with S=+2
• Investigating the parity of the exotic Theta^+ baryon from the kaon photoproduction
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• A possibility to determine the P-parity of the ${\Theta }^{+}$ pentaquark in the $pn\to {\Lambda }^0{\Theta }^{+}$ reaction
• Threshold production of the ${\Theta }^{+}$ in a polarized proton reaction
• Photoproduction of pentaquark cascades from nucleons
• Recent Results on Searches for Pentaquark States from STAR at RHIC
• Absence of evidence for pentaquarks on the lattice
• Magnetic moment of the pentaquark ${\Theta }^{+}(1540)$ with light-cone QCD sum rules
• Magnetic moment of the pentaquark ${\Theta }^{+}(1540)$ with QCD sum rules
• Effects of Instanton Induced Interaction on the Pentaquarks
• Polarization observables in the processes $p+p\to {\Theta }^{+}+{\Sigma }^{+}$ and $n+p\to {\Theta }^{+}+{\Lambda }^0$, for any spin and parity of the ${\Theta }^{+}$-hyperon in the threshold region
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• Pentaquarks in a relativistic quark model and nature of Theta-states
• Heavy and Light Pentaquark Chiral Lagrangian
• Study of a possible S=+1 dynamically generated baryonic resonance
• Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks
• Model-independent methods to measure the $P$-parity of the ${\Theta }^{+}$-pentaquark in photoproduction experiments
• Production of the pentaquark ${\Theta }^{+}$ in $np$ scattering
• Investigate the pentaquark resonance in the $NK$ system
• Relativistic five-quark equations and u, d- pentaquark spectroscopy
• Possibility of determinig the parity of the pentaquark ${\Theta }^{+}$ from photoproduction near threshold
• Relativistic five-quark equations and negative parity pentaquarks
• Tetraquark and Pentaquark Systems in Lattice QCD
• Structure and reactions of pentaquark baryons
• Some (further) Comments on the Theta(1540) Pentaquark
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• $\Lambda (1405)$ and $\bar{\Lambda }(1405)$ in $J/\psi$ four-body decays
• $P$-parity of charm and strange particles in electroproduction processes, in collinear regime
• Effect of Chiral Symmetry Restoration on Pentaquark ${\Theta }^{+}$ Mass and Width at Finite Temperature and Density
• Stability of the rotating SU(3) Skyrmion
• Width of Theta - pentaquarks in relativistic quark model