  We analyze Lorentz violations in the bosonic sector of a Yukawa-type quantum
field theory. The nonrelativistic potential may be determined to all orders in
the Lorentz violation, and we find that only specific types of modifications to
the normal Yukawa potential can be generated. The influence of this modified
potential on scattering and bounds states is calculated. These results could be
relevant to the search for new macroscopic forces, which may not necessarily be
Lorentz invariant.
