  A brief overview of Quantum Chromodynamics (QCD) as a non-Abelian gauge field
theory, including symmetries and formalism of interest, will precede a focused
discussion on the use of an Effective Field Theory (EFT) as a low energy
perturbative expansion technique. Regularization schemes involved in Chiral
Perturbation Theory (\c{hi}PT) will be reviewed and compared with EFT. Lattices
will be discussed as a useful procedure for studying large mass particles. An
Effective Field Theory will be formulated, and the self energy of the \r{ho}
meson for a Finite-Range Regulated (FRR) theory will be calculated. This will
be performed in both full QCD and the simpler quenched approximation (QQCD).
Finite-volume artefacts, due to the finite box size on the lattice, will be
quantified. Currently known lattice results will be used to calculate the
\r{ho} meson mass, and the possibility of unquenching will be explored. The aim
of the research was to determine whether a stable unquenching procedure for the
\r{ho} meson could be discovered. The results from the original research
indicate that there is no such procedure because the \r{ho} mesons are
unstable. Unless additional data involving lighter quark masses is available,
an element of modelling is needed for successful unquenching.
