  A controversy is raging concerning the most physically meaningful definition
of quark and gluon angular momentum, a question of importance in understanding
the internal structure of the nucleon. There are, in my, opinion, two principal
candidates: the Belinfante version, $\bm{J}_{bel}$, which is gauge invariant,
and the Canonical version, $ \bm{J}_{can}$, which is non-gauge invariant, but
which has a physically intuitive structure. I demonstrate the wholly unexpected
result that for quarks in a spin 1/2 nucleon the expectation value of
$\bm{J}_{bel}(\textrm{quark})$ is equal to the expectation value of $
\bm{J}_{can}(\textrm{quark})$ taken in the light-cone gauge $A^+=0$, with an
analogous result for gluons.

High Energy Physics - Phenomenology;Nuclear Theory