  Drawing on experimental data for baryon resonances, Hamiltonian effective
field theory (HEFT) is used to predict the positions of the finite-volume
energy levels to be observed in lattice QCD simulations. We have studied the
low-lying baryons $N^*(1535)$, $N^*(1440)$, and $\Lambda(1405)$. In the initial
analysis, the phenomenological parameters of the Hamiltonian model are
constrained by experiment and the finite-volume eigenstate energies are a
prediction of the model. The agreement between HEFT predictions and lattice QCD
results obtained at finite volume is excellent. These lattice results also
admit a more conventional analysis where the low-energy coefficients are
constrained by lattice QCD results, enabling a determination of resonance
properties from lattice QCD itself. The role and importance of various
components of the Hamiltonian model are examined in the finite volume. The
analysis of the lattice QCD data can help us to undertand the structure of
these states better.

Nuclear Theory;High Energy Physics - Phenomenology