  Core-collapse supernova explosions are driven by a central engine that
converts a small fraction of the gravitational binding energy released during
core collapse to outgoing kinetic energy. The suspected mode for this energy
conversion is the neutrino mechanism, where a fraction of the neutrinos emitted
from the newly formed protoneutron star are absorbed by and heat the matter
behind the supernova shock. Accurate neutrino-matter interaction terms are
crucial for simulating these explosions. In this proceedings for IAUS 331, SN
1987A, 30 years later, we explore several corrections to the neutrino-nucleon
scattering opacity and demonstrate the effect on the dynamics of the
core-collapse supernova central engine via two dimensional
neutrino-radiation-hydrodynamics simulations. Our results reveal that the
explosion properties are sensitive to corrections to the neutral-current
scattering cross section at the 10-20% level, but only for densities at or
above $\sim 10^{12}$ g cm$^{-3}$
