The pentaquark candidates in the dynamical diquark picture

Starting with the dynamical picture of the exotic cc¯-containing states XYZ   as the confinement-induced hadronization of a rapidly separating pair of a compact diquark and antidiquark, we describe the pentaquark candidates Pc+(4380) and Pc+(4450) in terms of a confined but rapidly separating color-antitriplet diquark cu   and color-triplet “triquark” c¯(ud). This separation explains the relatively small Pc+ widths, despite these 5-quark systems lying far above both the J/ψp and ΛcD¯(⁎)0 thresholds. The Pc+ states are predicted to form isospin doublets with neutral partners Pc0.