The pentaquark candidates in the dynamical diquark picture

Starting with the dynamical picture of the exotic c (c) over bar -containing states XYZ as the confinement-induced hadronization of a rapidly separating pair of a compact diquark and antidiquark, we describe the pentaquark candidates P-c(+) (4380) and P-c(+) (4450) in terms of a confined but rapidly separating colorantitriplet diquark cuand color-triplet triquark (c) over bar (ud). This separation explains the relatively small P-c(+) widths, despite these 5-quark systems lying far above both the J/psi p and Lambda(c)(D) over bar (()*()0) thresholds. The P-c(+) states are predicted to form isospin doublets with neutral partners P-c(0). (C) 2015 The Author. Published by Elsevier B.V.