Selected problems of baryons spectroscopy: chiral soliton versus quark models

Abstract

Inconsistency between rigid rotator and bound state models at arbitrary number of colors, rigid rotator -- soft rotator dilemma and some other problems of baryon spectroscopy are discussed in the framework of the chiral soliton approach (CSA). Consequences of the comparison of CSA results with simple quark models are considered and the $1/N_c$ expansion for the effective strange antiquark mass is presented, as it follows from the CSA. Strong dependence of the effective strange antiquark mass on the SU(3) multiplet is required to fit the CSA predictions. The difference of `good' and `bad' diquark masses, which is about 100 Mev, is in reasonable agreement with other estimates. Multibaryons (hypernuclei) with strangeness are described and some states of interest are predicted within CSA as well.

18 pages, 6 figures. Based partly on the talks at the Workshop NP08, Mito, Japan, March 05-07, 2008;15th International Seminar Quarks-2008, Sergiev Posad, Russia, May 23-29 and at the International Workshop HSQCD'2008, Gatchina, Russia, June 30 - July 4, 2008

References in corpus (9)

• Diquarks and Exotic Spectroscopy
• Pentaquark in the Skyrme Model
• Light Nuclei as Quantized Skyrmions
• Is Theta+(1540) a Kaon--Skyrmion Resonance?
• Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon
• Diquark correlations in baryons on the lattice with overlap quarks
• The $J=3/2$ ${\Theta }^{\ast }$ partner to the $\Theta (1540)$ baryon
• Bound State versus Collective Coordinate Approaches in Chiral Soliton Models and the Width of the ${\Theta }^{+}$ Pentaquark
• Baryon Spectrum in Large N(C) Chiral Soliton and in Quark Models

Cited by in corpus (1)

• Strong decays of singly heavy baryons from a chiral effective theory of diquarks