Eur. Phys. J. A (2005) 26: 361-382
https://doi.org/10.1140/epja/i2005-10180-5

Original Article

Bound-state versus collective-coordinate approaches in chiral soliton models and the width of the Θpentaquark

Fachbereich Physik, Siegen University, D-57068, Siegen, Germany

^* e-mail: weigel@physik.uni-siegen.de

Received: 17 October 2005
Accepted: 2 December 2005
Published online: 25 January 2006

Abstract

We thoroughly compare the bound-state and rigid-rotator approaches to three-flavored chiral solitons. We establish that these two approaches yield identical results for the baryon spectrum and kaon-nucleon S-matrix in the limit that the number of colors (N_C) tends to infinity. After proper subtraction of the background phase shift the bound-state approach indeed exhibits a clear resonance behavior in the strangeness S = + 1 channel. We present a first dynamical calculation of the widths of the Θ⁺ and Θ^* pentaquarks for finite N_C in a chiral soliton model.