The Width of the ${\Theta }^{+}$ Exotic Baryon in the Chiral Soliton Model

Abstract

In 1997 Diakonov, Petrov, and Polyakov, calculated the width of the exotic baryon that they called ${\Theta }^{+}$. The prediction, $\Gamma ({\Theta }^{+})\lesssim$ 15 MeV, has received considerable attention, especially in light of the narrowness of the experimentally reported ${\Theta }^{+}$ resonance. However, there is an arithmetic error in their work: when corrected, the width estimate quoted in that paper should have been $\lesssim$~30 MeV.

Comments: 3 pages, no figures; title and abstract changed, minor typographical changes, reference to original literature modified