The Pentaquark Candidates in the Dynamical Diquark Picture

2015/07/31 by Richard F. Lebed · 1 citation
Physics and Astronomy · #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.physletb.2015.08.032

5 pages, 1 pdf figure, pdflatex. Version accepted by Phys. Lett. B

arxiv created 2015/08/12 · arxiv updated 2015/09/30

Abstract

Starting with the dynamical picture of the exotic c c-containing states XY Z 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 color-antitriplet diquark cu and color-triplet "triquark" c (ud). This separation explains the relatively small P_c⁺ widths, despite these 5-quark systems lying far above both the J/ψ p and Λ_c D^(*)0 thresholds. The P_c⁺ states are predicted to form isospin doublets with neutral partners P_c⁰.

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