Chiral soliton model vs. pentaquark structure for Θ(1540)

Abstract

The exotic baryon Θ ⁺(1540 MeV) is visualized as an expected (iso) rotational excitation in the chiral soliton model. It is also argued as a pentaquark baryon state in a constituent quark model with strong diquark correlations. I contrast these two points of view; observe the similarities and differences between the two pictures. Collective excitation, the characteristic of chiral soliton model, points toward small mixing of representations in the wake of SU (3) breaking. In contrast, constituent quark models prefer near 'ideal' mixing, similar to ω-Φ mixing.