论文标题
在接下来的临时订单处深度为康普顿散射
Deeply-virtual Compton scattering at the next-to-next-to-leading order
论文作者
论文摘要
深度虚拟的康普顿散射可访问通用的Parton分布，这些分布编码有关质子在纵向动量中依赖质子中夸克和胶子横向位置的信息。预计从电子对撞机的大型运动学范围内的高精度实验数据为了计算两层，近代到临时型号（NNLO）DVCS DVCS系数函数，与大量Entergies的主要COMPTON形式相关的$ \ Mathcal H $和$ \ Mathcal e $相关的主要compton形式。 NNLO对$ \ Mathcal H $的虚构部分的校正似乎很大，由于Quark和Gluoon贡献之间的取消，对于简单GPD模型的输入标度$ q^2 = 4 $ GEV $^2 $。
Deeply-virtual Compton scattering gives access to the generalized parton distributions that encode the information on the transverse position of quarks and gluons in the proton in dependence in their longitudinal momentum. In anticipation of the high-precision experimental data in a broad kinematic range from the Electron-Ion Collider, we have calculated the two-loop, next-to-next-to-leading (NNLO) DVCS coefficient functions associated with the dominant Compton form factors $\mathcal H$ and $\mathcal E$ at large energies. The NNLO correction to the imaginary part of $\mathcal H$ appears to be rather large, up to factor two at the input scale $Q^2=4$ GeV$^2$ for simple GPD models, due to a cancellation between quark and gluon contributions.
