标题： 物理质量下基于区域墙格点QCD的核子同位旋形式因子 显示英文标题

标题： Nucleon isovector form factors from domain-wall lattice QCD at the physical mass

摘要： 由联合LHP、RBC和UKQCD合作组针对核子同位旋矢量流和轴矢流形式因子的2+1味动力学域墙费米子格点QCD集合进行的最新数值计算状态被展示。 晶格间距设定约为0.1141(3)飞米，晶格空间范围为48间距，约等于5.4750(14)飞米。 奇异夸克与简并上下夸克的质量值被设置为其接近物理值，以提供物理的$\Omega$质量和0.1392(2) GeV的简并π介子质量。 我们的核子质量估算约为0.947(6) GeV。 计算得到的矢量流和轴矢流形式因子中的可能激发态污染被更大的统计噪声掩盖。 形式因子形状参数（如均方根半径、异常磁矩或从形式因子提取的赝标耦合）的数值细节被描述，并且比较了用于提取这些参数的不同方法。 显示英文摘要

摘要： The current status of lattice-QCD numerical calculations by joint LHP, RBC, and UKQCD collaborations of nucleon isovector vector- and axialvector-current form factors using a 2+1-flavor dynamical domain-wall fermions lattice QCD ensemble generated jointly by RBC and UKQCD collaborations are presented. The lattice spacing is set at about 0.1141(3) fm, and the lattice spatial extent is 48 spacings or about 5.4750(14) fm. The strange and degenerate up and down quark mass values are set at their essentially physical values to provide the physical $\Omega$ mass and a degenerate pion mass of 0.1392(2) GeV. Our nucleon mass estimate is about 0.947(6) GeV. Possible excited-state contaminations in the calculated vector- and axialvector-current form factors are hidden below larger statistical noises. The numerical details of the form-factor shape parameters, such as the mean squared radii, the anomalous magnetic moment, or the pseudoscalar coupling extracted from the form factors, are described, along with comparisons of different approaches used to extract them.