Selected problems of baryons spectroscopy: chiral soliton versus quark models

TL;DR

This paper compares chiral soliton and quark models in baryon spectroscopy, addressing inconsistencies and deriving the strange antiquark mass dependence, with implications for multibaryons and hypernuclei.

Contribution

It provides a detailed analysis of baryon spectroscopy problems within the chiral soliton approach and compares results with quark models, including a $1/N_c$ expansion for strange antiquark mass.

Findings

CSA results depend strongly on SU(3) multiplet

Effective strange antiquark mass varies with multiplet

Predictions for multibaryons and hypernuclei states

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.