The D234 action for light quarks

We investigate a new light fermion action (the ``D234’’ action), which is accurate up to $\text{O}(a^3)$ and tadpole-improved $\text{O}(a{\alpha }_s)$ errors. Using D234 with Symanzik- and tadpole-improved glue we find evidence that continuum results for the quenched hadron spectrum (pion, rho and nucleon) can be obtained on coarse lattices.