论文标题
深度虚拟康普顿散射中的三个横截面
Twist-three cross-sections in deeply virtual Compton scattering
论文作者
论文摘要
我们研究了具有扭曲的两个和三个康普顿形式的深层虚拟康普顿散射过程，并呈现我们的横截面配方，并具有所有极化构型。尽管运动抑制在文献中通常认为三项贡献可以忽略不计，但我们将它们与典型JLAB 6 GEV和12个GEV运动学的Twist-Two进行了比较，以及EIC运动学以及EIC运动学，并显示了它们的运动学抑制作用，并明确地抑制了领先的Twist近似近似文学。此外，我们还使用wandzura-wilczek关系和基于重新居民模型的扭曲扭曲的三分之二分布的输入来估算扭曲的三个康普顿形式。借助这些估计的康普顿形态，我们分析了扭曲两家和三个横截面的运动学行为，并讨论了将领先的效果与高扭扭分开的最佳区域。
We study the deeply virtual Compton scattering process with both twist-two and twist-three Compton form factors and present our cross-sections formulas with all polarization configurations. While the twist-three contributions are generally assumed to be negligible in the literature due to the kinematical suppression, we compare them with the twist-two ones at typical JLab 6 GeV and 12 GeV kinematics as well as EIC kinematics and show their kinematical suppression explicitly, justifying the leading-twist approximation made in the literature. In addition, we also estimate the twist-three Compton form factors using Wandzura-Wilczek relations and inputs of twist-two generalized parton distributions based on a reggeized spectator model. With those estimated Compton form factors, we analyze the kinematical behavior of twist-two and twist-three cross-sections in a wide range of kinematics, and discuss the optimal regions for separating the leading-twist effects from the higher-twist ones.
