Successes and Problems of Chiral Soliton Approach to Exotic Baryons

Abstract

We briefly review the formulation of chiral quark soliton model and explain the difference and similarities with the Skyrme model. Next, we apply the model to calculate non-exotic and exotic mass spectra. We concentrate on large $N_c$ counting both for mass splittings and decay widths. It is shown that pure large $N_c$ arguments do not explain the small width of exotic pentaquark states.

Comments: Presented at the Cracow Epiphany Conference on Hadron Spectroscopy, Cracow, Poland, January 6-8, 2005