# QCD with dynamical Wilson fermions at $\beta=5.5$

## TL;DR

This paper investigates QCD with two dynamical Wilson fermions at a specific coupling, analyzing pion masses, lattice spacings, and spectroscopy to enhance understanding of non-perturbative QCD effects.

## Contribution

It provides new lattice QCD data at $eta=5.5$ with multiple pion masses and detailed spectroscopy results, advancing the study of dynamical fermion effects.

## Key findings

- Pion to rho mass ratios range from 0.76 to 0.62.
- Lattice spacings are approximately 0.1 fm.
- Spectroscopy results for various valence quark masses.

## Abstract

We study QCD with two flavors of dynamical Wilson fermions at $\beta = 5.5$ and three values of $\kappa$. The corresponding pion masses are 0.375, 0.324 and 0.262 in lattice units, with pion to rho mass ratios of 0.76, 0.71 and 0.62, respectively. We use the configurations to compute the heavy quark potential, leading to lattice spacings of 0.110, 0.105 and 0.099 fm, and to compute spectroscopy for several different valence quark $\kappa$'s.