# The D234 action for light quarks

## TL;DR

This paper introduces the D234 light quark action, which achieves high accuracy and enables continuum results for hadron spectra on coarse lattices, improving lattice QCD simulations.

## Contribution

The paper presents a new D234 fermion action with improved accuracy and demonstrates its effectiveness in lattice QCD simulations for hadron spectra.

## Key findings

- D234 action achieves $ ext{O}(a^3)$ accuracy.
- Continuum hadron spectrum results obtained on coarse lattices.
- Effective combination with improved glue yields reliable results.

## Abstract

We investigate a new light fermion action (the ``D234'' action), which is accurate up to $\O(a^3)$ and tadpole-improved $\O(a \alpha_s)$ 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.