论文标题
来自Lattice Feynman-Hellmann Techniques的广义Parton分布
Generalised Parton Distributions from Lattice Feynman-Hellmann Techniques
论文作者
论文摘要
我们报告使用Feynman-Hellmann技术来计算晶格QCD中的康普顿振幅（OFCA）。在领先的扭动中，欧几里得人口是通过广义Parton分布（GPD）的梅林矩进行参数化的。因此，我们提取两个柔软动量传递值的GPD矩，$ t = -1.10，-2.20 \; \ text {gev}^2 $和零 - 稳态的运动学运动学，在$m_π\ $m_π\ 470 \ 470 \; \ text {mev} $上的非小型旋转质量。这包括$ n = 4 $矩的首次确定。
We report on the use of Feynman-Hellmann techniques to calculate the off-forward Compton amplitude (OFCA) in lattice QCD. At leading-twist, the Euclidean OFCA is parameterised by the Mellin moments of generalised parton distributions (GPDs). Hence we extract GPD moments for two values of the soft momentum transfer, $t=-1.10, -2.20\;\text{GeV}^2$ and zero-skewness kinematics at an unphysical pion mass of $m_π\approx 470\;\text{MeV}$. This includes the first determination of the $n=4$ moments.
