# Light hadron masses with an $O(a^2)$ improved NNN action

## TL;DR

This paper calculates light meson and baryon masses using an improved lattice action that reduces discretization errors to order $O(a^2)$, comparing results at different lattice spacings to traditional Wilson action outcomes.

## Contribution

It introduces an $O(a^2)$ improved NNN action with next-nearest-neighbour terms for more accurate mass calculations in lattice QCD.

## Key findings

- Improved action yields more accurate hadron masses.
- Results at different lattice spacings show reduced discretization errors.
- Comparison with Wilson action demonstrates the effectiveness of the improvement.

## Abstract

Meson and baryon masses in the light (u,d and s) sector are calculated using tadpole-improved gauge field and fermion actions. These are corrected to order $O(a^2)$ on the classical level using next-nearest-neighbour terms. The results, obtained at lattice spacings of 0.4 and 0.27fm, are compared to Wilson action calculations.