Mass spectrum of pentaquarks

Abstract

We discuss the properties of the pentaquark in a collective stringlike model with a nonplanar configuration of the four quarks and the antiquark. In an application to the mass spectrum of exotic Theta baryons, we find that the ground state pentaquark has angular momentum and parity J(p)=1/2(-) and a small magnetic moment of 0.382 nuclear magnetons. The decay width is suppressed by the spatial overlap with the decay products.

Comments: 8 pages, 3 figures, 1 table, invited talk at 23rd International Workshop on Nuclear Theory, June 14-19, 2004, Rila, Bulgaria