Light hadron spectrum in 2+1 flavor full QCD by CP-PACS and JLQCD Collaborations

TL;DR

This study presents results from a joint lattice QCD simulation with 2+1 flavors, using improved actions to accurately determine the light meson spectrum and quark masses, removing previous quenching uncertainties.

Contribution

It provides the first unquenched 2+1 flavor full QCD results for light meson spectrum and quark masses using RG-improved gauge and non-perturbatively improved Wilson quark actions.

Findings

Light meson spectrum obtained at a lattice spacing of 0.10 fm.

Quark masses determined with reduced systematic errors.

Simulation successfully removes quenching effects of all three light quarks.

Abstract

CP-PACS and JLQCD Collaborations are carrying out a joint project of the 2+1 flavor full QCD with the RG-improved gauge action and the non-perturbatively ${\cal O}(a)$-improved Wilson quark action. This simulation removes quenching effects of all three light quarks, which is the last major uncertainty in lattice QCD. In this report we present our results for the light meson spectrum and quark masses on a $20^3\times 40$ lattice at the lattice spacing $a\simeq 0.10$ fm.