论文标题
nnlo Quark Beam函数用于喷气式VETO重新调整
The NNLO quark beam function for jet-veto resummation
论文作者
论文摘要
我们考虑了描述共线初始状态辐射的夸克梁函数，该辐射受到重建的喷气机对否决的约束。由于将否决权施加在喷气机的横向动量上，因此梁函数会受到速度差异的影响，并且我们使用colinear-Anomaly框架将扰动匹配的内核提取到强耦合扩展中的近代到next to-nlo。我们的计算基于一个新型框架，该框架可以自动化Mellin空间中光束函数的计算，并提供了将Quark发射过程的喷气式VETO重新调整扩展到NNLL $'$精度的成分。
We consider the quark beam function that describes collinear initial-state radiation that is constrained by a veto on reconstructed jets. As the veto is imposed on the transverse momenta of the jets, the beam function is subject to rapidity divergences, and we use the collinear-anomaly framework to extract the perturbative matching kernels to next-to-next-to-leading order (NNLO) in the strong-coupling expansion. Our calculation is based on a novel framework that automates the computation of beam functions in Mellin space and it provides the ingredients to extend jet-veto resummations for quark-initiated processes to NNLL$'$ accuracy.
