论文标题
晶格QCD核子的等分离器轴向形状因子
The isovector axial form factor of the nucleon from lattice QCD
论文作者
论文摘要
核子的等分离器轴向形式在解释长基线中微子振荡实验的数据中起关键作用。我们对此形式进行基于晶格-QCD的计算，引入了一种新方法，可以直接从晶格相关器中提取其$ z $ - expansion。我们对外形的最终参数化延伸到具有完全量化的不确定性的{\ rm gev}^2 $ $ 0.7 \，{\ rm gev}^2 $的最终参数化，与以前的晶格计算相一致，但比中性中微子偏度散射数据明显较小。
The isovector axial form factor of the nucleon plays a key role in interpreting data from long-baseline neutrino oscillation experiments. We perform a lattice-QCD based calculation of this form factor, introducing a new method to directly extract its $z$-expansion from lattice correlators. Our final parametrization of the form factor, which extends up to spacelike virtualities of $0.7\,{\rm GeV}^2$ with fully quantified uncertainties, agrees with previous lattice calculations but is significantly less steep than neutrino-deuterium scattering data suggests.
