A Perspective on Pentaquarks

Abstract

Recent discoveries of manifestly exotic, narrow baryon resonances present a fundamental challenge for our theoretical understanding of low-energy QCD. This is a brief survey of their interpretation, emphasizing the possibility that diquark correlations are centrally involved. Many predictions and suggestions for future directions follow from that idea.

8 pages; Plenary talk by FW at the European Physical Society, Aachen, August 2003; proposed operator for 1/2+ pentaquark lattice simulation corrected; references added

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• Exploring the resonances $X(4140)$ and $X(4274)$ through their decay channels
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• Pentaquark Decay Width in QCD Sum Rules
• Charm Physics - A Field Full with Challenges and Opportunities
• Roper State from Overlap Fermions
• A Review of Pentaquark Calculations on the Lattice
• Stable Pentaquarks from Strange Chiral Multiplets
• Lower Excitation Spectrum of the Nucleon and Delta in a Relativistic Chiral Quark Model
• Relativistic Calculation of the Width of the Theta (1540) Pentaquark