论文标题
Z Plus Jet生产的两环QCD-EW主积分在大横向动量下
Two-Loop QCD-EW Master Integrals for Z Plus Jet Production at Large Transverse Momentum
论文作者
论文摘要
electroweak $ z $玻色子的生产腐烂到中微子，并反抗具有较大横向动量的喷气机$ p_ \ perp $是在大型强子撞机（LHC）上搜索暗物质的重要背景过程。为了完全受益于未来的高光度LHC提供的机会，应扩展$ pp \ to z+j $过程的理论描述，包括混合QCD-ElectRoweak校正。本文的目的是从计算$ q \ bar q \ q \ b q $ g $散射幅度所需的Feynman积分贡献所需的Feynman积分开始，开始计算此类校正。利用后退喷气机的大型横向动量之间的层次结构，与重的暗物质搜索相关，以及$ z $ boson质量$ m_ {z} $，我们将相关的主积分作为$ m_ {z}}/p_ \ perp $的系列扩展。
The production of electroweak $Z$ bosons that decay to neutrinos and recoil against jets with large transverse momentum $p_\perp$ is an important background process to searches for dark matter at the Large Hadron Collider (LHC). To fully benefit from opportunities offered by the future high-luminosity LHC, the theoretical description of the $pp \to Z+j$ process should be extended to include mixed QCD-electroweak corrections. The goal of this paper is to initiate the computation of such corrections starting with the calculation of the Feynman integrals needed to describe two-loop QCD-electroweak contributions to $q \bar q \to Z+g$ scattering amplitudes. Making use of the hierarchy between the large transverse momenta of the recoiling jet, relevant for heavy dark matter searches, and the $Z$ boson mass $m_{Z}$, we present the relevant master integrals as a series expansion in $m_{Z}/p_\perp$.
