QCD with two dynamical flavors of chirally improved quarks

TL;DR

This paper presents initial results of simulating two-flavor lattice QCD using Chirally Improved Fermions, aiming to approach physical pion masses with manageable computational costs.

Contribution

It introduces a dynamical implementation of Chirally Improved Fermions in lattice QCD simulations, demonstrating feasibility and initial findings.

Findings

Successful implementation of Hybrid Monte Carlo algorithm for Chirally Improved Fermions

Simulation on 12^3x24 lattices with pion masses approaching physical values

Analysis of chiral properties and computational performance

Abstract

Considering Ginsparg-Wilson type fermions dynamically in lattice QCD simulations is a challenging task. The hope is to be able to approach smaller pion masses and to eventually reach physical situations. The price to pay is substantially higher computational costs. Here we discuss first results of a dynamical implementation of the so-called Chirally Improved Fermions, a Dirac operator that obeys the Ginsparg-Wilson condition approximately. The simulation is for two species of mass-degenerate quarks on 12^3x24 lattices with spatial size up to 1.55 fm. Implementation of the Hybrid Monte-Carlo algorithm and an analysis of the results are presented.