Aspects of Confinement: a Brief Review

A brief and biased overview of the phenomenon of confinement in QCD is presented in three parts: (1) the definition of confinement, (2) properties of confinement, (3) ideas of confinement. The second part chiefly consists of a brief review of recent lattice computations related to confinement while the third summarizes some of the current analytical approaches to understanding confinement. These include the Dyson-Schwinger formalism in Landau gauge, Hamiltonian QCD in Coulomb gauge, and the vortex picture of confinement.Comment: 10 pages, 6 eps figures. Plenary talk at Hadron 2003, Aschaffenburg, German

XYZ States: Theory Overview

Various ideas associated with exotic hadrons, and hadronic structure in general, are briefly reviewed.Comment: 6 pages, Proceedings of Hadron201

Molecular Interpretation of the X(3872)

The discovery of the X(3872) in the 3\pi J/\psi mode is compelling evidence for its molecular nature. A successful prediction of this decay mode and other predictions are reviewed here.Comment: 3 pages, ICHEP proceeding

A Canonical Ds(2317)?

It is shown that quark mass dependence induced by one loop corrections to the Breit-Fermi spin-dependent one gluon exchange potential permit an accurate determination of heavy-light meson masses. Thus the $D_s(2317)$ is a canonical $c\bar s$ meson in this scenario. The multiplet splitting relationship of chiral doublet models, $M(1^+)-M(1^-) = M(0^+) -M(0^-)$, holds to good accuracy in the $D$ and $D_s$ systems, but is accidental. Radiative transitions and bottom flavoured meson masses are discussed.Comment: 7 pages, 6 figures. References improve