  Variational analysis techniques in lattice QCD are powerful tools that give
access to the excited state spectrum of QCD. At zero momentum, these techniques
are well established and can cleanly isolate energy eigenstates of either
positive or negative parity. In order to compute the form factors of a single
energy eigenstate, we must perform a variational analysis at non-zero momentum.
When we do this with baryons, we run into issues with parity mixing, as boosted
baryons are not eigenstates of parity. The parity-expanded variational analysis
(PEVA) technique is a novel method for ensuring the successful and consistent
isolation of boosted baryon eigenstates. This is achieved through a parity
expansion of the operator basis used to construct the correlation matrix.
World-first calculations of excited state nucleon form factors using this new
technique are presented, showing the improvement over conventional methods.
