论文标题
后坐力质子极化：可观察到的新判别DVC
The Recoil Proton Polarization: a new discriminative DVCS observable
论文作者
论文摘要
广义的Parton分布描述了纵向动量与核子中夸克和胶结的横向位置之间的相关性。它们可以通过测量光子瘦素生成生成可观察物来限制，这是由于伯特·霍特勒和深层虚拟康普顿散射过程之间的干扰而产生的。在领先的扭转/领先阶段，后者的幅度通过GPDS {H，E，H，E}的复杂积分进行了参数化。由于在非极化或纵向极化的目标约束H和H上收集的数据h和h，E闻名不佳，因为它需要用横向极化目标收集的数据，这在固定目标实验中实现非常具有挑战性。到目前为止，唯一考虑的唯一替代方法是在具有氘靶的中子上的DVC，同时假设同源对称性和最终状态相互作用的缺失。今天，我们将后坐力质子的极化引入了可观察到的新DVC，对E高度敏感，对于在杰斐逊实验室等高光度设施的实验研究中，这似乎是可行的。
Generalized parton distributions describe the correlations between the longitudinal momentum and the transverse position of quarks and gluons in a nucleon. They can be constrained by measuring photon leptoproduction observables, arising from the interference between Bethe-Heitler and Deeply virtual Compton scattering processes. At leading-twist/leading-order, the amplitude of the latter is parameterized by complex integrals of the GPDs {H, E, H, E} . As data collected on an unpolarized or longitudinally polarized target constrains H and H, E is poorly known as it requires data collected with a transversely polarized target, which is very challenging to implement in fixed target experiments. The only alternative considered so far has been DVCS on a neutron with a deuterium target, while assuming isospin symmetry and absence of final-state interactions. Today, we introduce the polarization of the recoil proton as a new DVCS observable, highly sensitive to E, which appears feasible for an experimental study at a high-luminosity facility such as Jefferson Lab.
