A Naturally Narrow Positive Parity Theta^+

Abstract

We present a consistent color-flavor-spin-orbital wave function for a positive parity Theta^+ that naturally explains the observed narrowness of the state. The wave function is totally symmetric in its flavor-spin part and totally antisymmetric in its color-orbital part. If flavor-spin interactions dominate, this wave function renders the positive parity Theta^+ lighter than its negative parity counterpart. We consider decays of the Theta^+ and compute the overlap of this state with the kinematically allowed final states. Our results are numerically small. We note that dynamical correlations between quarks are not necessary to obtain narrow pentaquark widths.

10 pages, 1 figure, Revtex4, two-column format, version to be published in Phys. Rev. D, includes numerical estimates of decay widths

References in corpus (47)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Diquarks and Exotic Spectroscopy
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• The Spectrum of the Nucleons and the Strange Hyperons and Chiral Dynamics
• 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 an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS
• Pentaquark hadrons from lattice QCD
• Evidence for formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• K+ nucleon scattering and exotic S=+1 Baryons
• Understanding Pentaquark States in QCD
• Stable $uudd\bar{s}$ pentaquarks in the constituent quark model
• Pentaquark in the Skyrme Model
• Z^* Resonances: Phenomenology and Models
• Phenomenology of the Pentaquark Antidecuplet
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners
• Radial excitations of low--lying baryons and the $Z^{+}$ penta--quark
• Are ${\Theta }^{+}$ and the Roper resonance diquark-diquark-antiquark states?
• Exotic baryon states in topological soliton models
• Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon
• ${\Theta }^{+}$ in a chiral constituent quark model and its interpolating fields
• The Evidence for a Pentaquark Signal and Kinematic Reflections
• The Theta+ (1540) as a heptaquark with the overlap of a pion, a kaon and a nucleon
• Pentaquark Exotic Baryons in the Skyrme Model
• Positive parity pentaquarks in a Goldstone boson exchange model
• Exotic Theta^+ baryon production induced by a photon and a pion
• A Method to Unambiguously Determine the Parity of the Theta+ Pentaquark
• Positive Parity Pentaquarks Pragmatically Predicted
• Partners of the Theta^+ in Large N_c QCD
• Cross sections for pentaquark baryon production from protons in reactions induced by hadrons and photons
• Is the Theta+ a K pi N bound state?
• Pentaquark Magnetic Moments In Different Models
• Pentaquark Theta+, constituent quark structures, and prediction of charmed Theta(c)^0 and bottomed Theta(b)^+
• The $J=3/2$ ${\Theta }^{\ast }$ partner to the $\Theta (1540)$ baryon
• Production of the exotic Theta baryon in relativistic nuclear collisions
• Study the exotic ${\Theta }^{+}$ with polarized photon beams
• Determination of the ${\Theta }^{+}$ parity from $\gamma n\to K^{-}{K}^{+}n$
• Time delayed K+ N reactions and exotic baryon resonances
• Pentaquark spectrum in string dynamics
• Magnetic Moment of The ${\Theta }^{+}$ Pentaquark State
• 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 $\gamma p\to {\pi }^{+}{K}^{-}{\Theta }^{+}$
• The Narrow Theta(1543)--A QCD Dilemma: Tube or Not Tube?
• History of exotic Meson (4-quark) and Baryon (5-quark) States
• Probing the partonic structure of pentaquarks in hard electroproduction

Cited by in corpus (34)

• Chiral-Soliton Predictions for Exotic Baryons
• Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N
• Pentaquark baryons in SU(3) quark model
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• Estimate of the Theta+ width in the Relativistic Mean Field Approximation
• Prospects for Pentaquark Production at Meson Factories
• Prediction of Narrow $J^{\pi }=1/2^{+}$, $3/2^{+}$, and $3/2^{-}$ states of ${\Theta }_{+}$ in a Quark model with Antisymmetrized Molecular Dynamics
• Decay of Theta+ in a quark model
• An explanation why the Theta+ is seen in some experiments and not in others
• A comprehensive search for the Θ^+ pentaquark on the lattice
• A possible explanation why the Theta+ is seen in some experiments and not in others
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Decay width of the pentaquark state ${\Theta }^{+}(1540)$ with QCD sum rules
• Magnetic moment of the pentaquark ${\Theta }^{+}(1540)$ with QCD sum rules
• Absence of evidence for pentaquarks on the lattice
• Magnetic moment of the pentaquark ${\Theta }^{+}(1540)$ with light-cone QCD sum rules
• Baryons as Fock states of 3,5,... quarks
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• Heavy and Light Pentaquark Chiral Lagrangian
• The anti-decuplet candidate Xi--(1862) as a heptaquark with the overlap of two anti-kaons and a nucleon
• Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks
• Production of the pentaquark ${\Theta }^{+}$ in $np$ scattering
• Stable Pentaquarks from Strange Chiral Multiplets
• A Selection Rule for Multiquark Decays
• Possibility of determinig the parity of the pentaquark ${\Theta }^{+}$ from photoproduction near threshold
• Diquark in Nona-quark States
• Structure and decay width of Θ^+ in a one-gluon exchange model
• Relativistic five-quark equations and exotic baryons with isospin I=5/2
• Pentaquark Masses in Chiral Perturbation Theory
• Effect of Chiral Symmetry Restoration on Pentaquark ${\Theta }^{+}$ Mass and Width at Finite Temperature and Density
• P-wave Pentaquark and its Decay in the Quark Model with Instanton Induced Interaction
• Relativistic Calculation of the Width of the Theta (1540) Pentaquark
• Pentaquarks: Theory overview, and some more about quark models
• Heavy Pentaquarks in the Diquark Model and the Large N_c Expansion