Some nucleon isovector observables from 2+1-flavor domain-wall QCD at the physical pion mass

TL;DR

This paper reports on lattice QCD calculations of nucleon isovector form factors and structure function moments using a 2+1-flavor domain-wall fermion ensemble at the physical pion mass, with updated statistics and boundary condition corrections.

Contribution

It presents the latest results from joint LHP and RBC collaborations on nucleon observables using physical pion mass lattice QCD with refined boundary conditions.

Findings

Corrected boundary conditions changed results by less than 1%

Achieved high-precision nucleon form factors at physical pion mass

Utilized a large lattice volume of approximately 5.5 fm

Abstract

The current status of the LHP and RBC joint calculations of the nucleon isovector form factors and low moments of structure functions with a 2+1-flavor dynamical domain-wall fermion (DWF) lattice-QCD ensemble at the physical pion mass generated by RBC and UKQCD Collaborations with a momentum cutoff of 1.730(4) GeV and lattice spatial extent of 5.476(12) fm is reported. About ten percent of the statistics reported in Lattice 2014 were found with an incorrect boundary condition in time but correcting for it resulted in less than one-percent difference.