Three-quark flavour-dependent force in pentaquarks
We review critically the predictions of pentaquark masses in the quark model, in particular those based on the Glozman-Riska hyperfine interaction. This leads us to the U-A(1) symmetry breaking Kobayashi-Kondo-Maskawa,tHooft interaction. We discuss its phenomenological consequences in pentaquarks.
- International Workshop on Pentaquark 04, Proceedings, Jul 20-23, 2004, Nishiharima, Japan