Scale setting and hadronic properties in light quark sector with $(2+1)$-flavor Wilson fermions at the physical point

TL;DR

This paper presents a comprehensive lattice QCD study using $(2+1)$-flavor Wilson fermions at the physical point, determining scale setting and hadronic properties with high precision, matching experimental results within sub-percent accuracy.

Contribution

It introduces a new set of lattice configurations at the physical point and provides detailed calculations of hadronic properties with improved accuracy.

Findings

Hadron masses agree with experimental values within sub-percent

Effective scale setting via $oldsymbol{ ext{Omega}}$ baryon mass

Configuration properties like topological charge are well characterized

Abstract

We report scale setting and hadronic properties for our new lattice QCD gauge configuration set (HAL-conf-2023). We employ $(2+1)$-flavor nonperturbatively improved Wilson fermions with stout smearing and the Iwasaki gauge action on a $96^4$ lattice, and generate configurations of 8,000 trajectories at the physical point. We show the basic properties of the configurations such as the plaquette value, topological charge distribution and their auto-correlation times. The scale setting is performed by detailed analyses of the $\Omega$ baryon mass. We calculate the physical results of quark masses, decay constants of pseudoscalar mesons and single hadron spectra in light quark sector. The masses of the stable hadrons are found to agree with the experimental values within a sub-percent level.