# Light hadron masses with a tadpole-improved next-nearest-neighbour lattice fermion action

## TL;DR

This paper presents lattice QCD calculations of light hadron masses using a tadpole-improved next-nearest-neighbour fermion action, achieving results close to experimental values at relatively coarse lattice spacings.

## Contribution

It introduces a discretization error corrected fermion action with next-nearest-neighbour couplings and tadpole improvement, improving hadron mass calculations in lattice QCD.

## Key findings

- Hadron masses close to experimental values at coarse lattice spacings
- Comparison shows improved accuracy over Wilson action
- Discretization errors reduced to $O(a^2)$ at classical level

## Abstract

Calculations of hadron masses are done in quenched approximation using gauge field and fermion actions which are both corrected for discretization errors to $O(a^2)$ at the classical level and which contain tadpole improvement factors. The fermion action has both nearest-neighbour and next-nearest-neighbour couplings in the kinetic and Wilson terms. Simulations done at lattice spacings of $0.27$ and $0.4$fm yield hadron masses which are already quite close to experimental values. The results are compared to Wilson action calculations done at comparable lattice spacings.