Spectroscopy of pentaquark states

Abstract

We construct a complete classification of pentaquark states in terms of the spin-flavour SU(6) representations. We find that only some definite SU(3) representations are allowed, singlets, octets, decuplets, anti-decuplets, 27-plets and 35-plets. The latter three contain exotic states, which cannot be constructed from three quarks only. This complete classification scheme is general and model independent and is useful both for model builders and experimentalists. The mass spectrum is obtained from a Gursey-Radicati type mass formula, whose coefficients have been determined previously by a study of qqq baryons. The ground state pentaquark which is identified with the recently observed Theta(1540) state, is predicted to be an isosinglet anti-decuplet state. Its parity depends on the interplay between the spin-flavour and orbital contributions to the mass operator.

arXiv comment26 pages, 4 figures, 11 tables, revised version with 2 extra tables, an updated list of references and expanded discussion of the results. Accepted for publication in Eur. Phys. J. A

References in corpus (22)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• 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
• Evidence for the positive-strangeness pentaquark ${\Theta }^{+}$ in photoproduction with the SAPHIR detector at ELSA
• Algebraic models of hadron structure: I. Nonstrange baryons
• Observation of an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS
• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• A Diquark-Triquark Model for the KN Pentaquark
• Pentaquark hadrons from lattice QCD
• Evidence for formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• Understanding Pentaquark States in QCD
• Low lying $qqqq\bar{q}$ states in the baryon spectrum
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners
• Phenomenology of the Pentaquark Antidecuplet
• Radial excitations of low--lying baryons and the $Z^{+}$ penta--quark
• Pentaquark states in a chiral potential
• ${\Theta }^{+}$ in a chiral constituent quark model and its interpolating fields
• Positive parity pentaquarks in a Goldstone boson exchange model
• Heavy-Flavour Pentaquarks in a Chiral Constituent Quark Model
• Partners of the Theta^+ in Large N_c QCD
• Magnetic moments of antidecuplet pentaquarks

Cited by in corpus (20)

• Analysis of $P_c^{+}(4380)$ and $P_c^{+}(4450)$ as pentaquark states in the molecular picture with QCD sum rules
• Hidden charm pentaquarks: mass spectrum, magnetic moments, and photocouplings
• A New Application of the Gursey and Radicati Mass Formula
• Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N
• Spectrum of the $uudc\bar{c}$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction
• Estimate of the Theta+ width in the Relativistic Mean Field Approximation
• Pentaquark components in low-lying baryon resonances
• Phenomenological predictions for pentaquark masses from fits to baryon masses
• A comprehensive search for the Θ^+ pentaquark on the lattice
• Tetraquark Masses by using extension of Gursey-Radicati Mass Formula
• Decay width of the pentaquark state ${\Theta }^{+}(1540)$ with QCD sum rules
• Possible existence of a dibaryon candidate $N\Delta$ ($D_{21}$)
• Absence of evidence for pentaquarks on the lattice
• On Some properties of Di-hadronic states
• A Selection Rule for Multiquark Decays
• Systematic study of pentaquark states: $qqq-q\bar{q}$ configuration
• Quantum Numbers of the Pentaquark States $P_c^{+}$ via Symmetry Analysis
• Pentaquark states with hidden charm
• P-wave Pentaquark and its Decay in the Quark Model with Instanton Induced Interaction
• Complete basis for the pentaquark wave function in a group theory approach