# Symanzik improvement of lattice QCD with four flavors of Wilson quarks

## TL;DR

This paper non-perturbatively determines the O(a)-improvement coefficient c_sw for four-flavor Wilson quarks in lattice QCD, enhancing the accuracy of simulations by reducing discretization errors.

## Contribution

It provides a new non-perturbative calculation of c_sw for four-flavor Wilson quarks, improving lattice QCD precision.

## Key findings

- Determined c_sw for beta >= 5
- Fitted data with Pade approximations for stability
- Small extrapolation below beta=5 is feasible

## Abstract

We have determined the non-perturbative O(a)-improvement coefficient c_sw for four flavors of Wilson quarks with the plaquette gauge action in a range of beta >= 5. The data are fitted with several Pade approximation formulae to get an impression of the stability. A small extrapolation below beta=5 seems acceptable.