Chiral-Soliton Predictions for Exotic Baryons

2004/01/31 by John Ellis, Marek Karliner, Michał Praszałowicz +1 · 99 citations
Physics and Astronomy · #Baryon #Exotic hadron #High-Energy Particle Collisions Research #Moment of inertia #Nuclear physics #Nucleon #Octet #Particle physics #Particle physics theoretical and experimental studies #Pentaquark #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scattering #Soliton #hep-ph

paper · pdf · doi:10.1088/1126-6708/2004/05/002

published in Journal of High Energy Physics 2004(05), 002 (Springer Nature) · reset in JHEP style; typos corrected, references added

openalex publication_date 2004/05/05 · arxiv created 2004/05/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We re-analyze the predictions of chiral-soliton models for the masses and decay widths of baryons in the exotic antidecuplet of flavour SU(3). The calculated ranges of the chiral-soliton moment of inertia and the π-nucleon scattering Σterm are used together with the observed baryon octet and decuplet mass splittings to estimate 1430 MeV < m_Θ⁺ < 1660 MeV and 1790 MeV < m_Ξ^-- < 1970 MeV. These are consistent with the masses reported recently, but more precise predictions rely on ambiguous identifications of non-exotic baryon resonances. The overall decay rates of antidecuplet states are sensitive to the singlet axial-current matrix element in the nucleon. Taking this from polarized deep-inelastic scattering experiments, we find a suppression of the total Θ⁺ and Ξ^-- decay widths that may not be sufficient by itself to reproduce the narrow widths required by experiments. We calculate SU(3) breaking effects due to representation mixing and find that they tend to suppress the Θ⁺ decay width, while enhancing that of the Ξ^--. We predict light masses for some exotic 27 baryons, including the I=1, J^P=3/2⁺ Θ⁺ and I=3/2, J^P=3/2⁺ Ξmultiplets, and calculate their decay widths.

Citations

• The Constituent Quark Model Revisited - Quark Masses, New Predictions for Hadron Masses and KN Pentaquark
• The pion nucleon coupling constant and the Goldberger-Treiman relation
• θ+baryon in soliton models: LargeNcQCD and the validity of rigid-rotor quantization
• Are there non-strange low-lying penta-quarks and can we understand their width
• A unified field theory of mesons and baryons
• The constituent quark limit and the skyrmion limit of chiral quark soliton model
• Updated analysis of meson-nucleonσterms in the perturbative chiral quark model
• Global aspects of current algebra
• Is Θ+(1540) a kaon–skyrmion resonance?
• The width of the Θ ⁺ exotic baryon in the chiral soliton model
• A Method to Unambiguously Determine the Parity of the + Pentaquark
• Understanding Pentaquark States in QCD
• Experimental limits on the width of the reportedΘ(1540)+
• 1/Nc rotational corrections to gA and isovector magnetic moment of the nucleon
• Diquarks and Exotic Spectroscopy
• Pentaquark as a kaon-nucleon resonance
• A non-linear field theory
• Chiral Quark-Soliton Model
• Axial-vector properties of the nucleon with 1/Nccorrections in the solitonic SU(3)-NJL model
• Non-lattice determinations of the light quark masses
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Influence of aZ+(1540)resonance onK+Nscattering
• Review of particle properties
• Review of Particle Physics

Cited by

• Mass splittings of the baryon decuplet and antidecuplet with second-order flavor symmetry breakings within a chiral soliton model
• Coupled variations of fundamental couplings and primordial nucleosynthesis