A diquark-triquark model for the KN pentaquark

摘要

We propose a model for the recently discovered Theta(+) exotic K N resonance as a novel kind of a pentaquark with an unusual color structure: a (3) over bar (c) ud diquark, coupled to 3(c) ud (s) over bar triquark in a relative P-wave. The state has J(P) = 1/2(+), I = 0 and is an antidecuplet of SU(3)(f). A rough mass estimate of this pentaquark is close to experiment. (C) 2003 Elsevier B.V. All rights reserved. [References: 28]