  Recent work by Armoni, Shifman, and Veneziano suggests a large-N equivalence
between supersymmetric Yang-Mills Theory and one-flavor QCD. One consequence of
this "orientifold projection" is that scalar and pseudoscalar mesons in
one-flavor QCD should have degenerate mass since they lie within the same
Wess-Zumino supermultiplet. We use lattice calculations to investigate the mass
shifts caused by "double-hairpin" annihilation diagrams in quenched QCD to test
for this degeneracy. Similar quark-antiquark annihilation processes are studied
in the 2-dimensional CP(N-1) model with quenched fermions.
