论文标题
晶格QCD的纵向和横向质子结构函数的力矩和功率校正
Moments and power corrections of longitudinal and transverse proton structure functions from lattice QCD
论文作者
论文摘要
我们提出了$ f_2 $和$ f_l $结构功能的同时提取质子的一系列光子虚拟性的$ q^2 $。这是通过使用二阶Feynman-Hellmann定理计算晶格上的正向综合幅度来实现的。我们的计算是在具有两个不同的晶格间距和卷的配置上执行的，all ass $ su（3）$对称点。我们发现$ f_ {2} $和$ f_ {l} $的时刻与实验达成一致。功率更正很重要。这是$ q^2 $依赖性$ f_2 $的最低时刻的依赖性。
We present a simultaneous extraction of the moments of $F_2$ and $F_L$ structure functions of the proton for a range of photon virtuality, $Q^2$. This is achieved by computing the forward Compton amplitude on the lattice utilizing the second-order Feynman-Hellmann theorem. Our calculations are performed on configurations with two different lattice spacings and volumes, all at the $SU(3)$ symmetric point. We find the moments of $F_{2}$ and $F_{L}$ in good agreement with experiment. Power corrections turn out to be significant. This is the first time the $Q^2$ dependence of the lowest moment of $F_2$ has been quantified.
