Three flavor dynamical QCD project by CP-PACS/JLQCD

TL;DR

This paper reports on the initial results of a large-scale lattice QCD simulation incorporating three dynamical quark flavors, aiming to achieve a more realistic modeling of quantum chromodynamics and analyze light hadron spectra and quark masses.

Contribution

It introduces the first large-scale three-flavor dynamical QCD simulation using advanced algorithms and computational resources, advancing towards realistic lattice QCD modeling.

Findings

Initial light hadron spectrum results obtained

Light quark masses estimated from simulations

Validation of simulation algorithms and improvement coefficients

Abstract

The CP-PACS and JLQCD Collaborations have been made systematic studies of lattice QCD carrying out both chiral and continuum extrapolations. Importance of dynamical quark effects has been clarified by a comparison of quenched QCD and two flavor full QCD simulations. In two flavor simulations, the dynamical effects of $u$ and $d$ quarks are taken into account, but the third quark $s$ is still treated in a quenched approximation. As the final step towards a fully realistic lattice simulation of QCD, two collaborations started a joint project of three flavor QCD, concentrating all big computers available. Based on a series of preparative studies of exact simulation algorithm and non-perturbative improvement coefficient, a large scale simulation of three flavor QCD has been started. I present the results of light hadron spectrum and light quark masses from the first production runs.