Pentaquark Baryons in String Theory -- Talk at Pentaquark 04

Abstract

Pentaquark baryons ${\Theta }^{+}$ and ${\Xi }^{--}$ are studied in the dual gravity theory of QCD in which simple mass formulae of pentaquarks are derived in the Maldacena prototype model for supersymmetric QCD and a more realistic model for ordinary QCD. In this approach it is possible to explain the extremely narrow decay widths of pentaquarks. With the aim of constructing more reliable mass formulae, a sketch is given on spin and the hyperfine interaction in the string picture.

talk given by A. Sugamoto at International Workshop PENTAQUARK04, July 20-23 (2004) at SPring-8; to appear in the proceedings