论文标题
天线减法形式主义中的光子碎片
Photon Fragmentation in the Antenna Subtraction Formalism
论文作者
论文摘要
粒子山脉的光子产生的理论描述结合了直接光子辐射和碎片化过程，这些过程无法彼此分离，以定义实验测量中使用的光子隔离。这些过程的理论描述必须说明沿线parton-photon构型，保留对光子动量分数的依赖性，并包括parton到photon碎片函数。我们将天线减法方法扩展到包括光子碎片过程，直到QCD中的近代到领先顺序（NNLO）。使用新引入的片段化天线函数和相关的相空间映射来处理线性光子辐射。我们得出了碎片天线功能的整合形式，并描述了它们与光子碎片函数的质量分解的相互作用。概述了最高的NNLO的天线减法项的构建原理，从而使该方法适用于围墙的不同光子生产过程。
The theoretical description of photon production at particle colliders combines direct photon radiation and fragmentation processes, which can not be separated from each other for definitions of photon isolation used in experimental measurements. The theoretical description of these processes must account for collinear parton-photon configurations, retaining the dependence on the photon momentum fraction, and includes the parton-to-photon fragmentation functions. We extend the antenna subtraction method to include photon fragmentation processes up to next-to-next-to-leading order (NNLO) in QCD. Collinear photon radiation is handled using newly introduced fragmentation antenna functions and associated phase space mappings. We derive the integrated forms of the fragmentation antenna functions and describe their interplay with the mass factorisation of the photon fragmentation functions. The construction principles of antenna subtraction terms up to NNLO for identified photons are outlined, thereby enabling the application of the method to different photon production processes at colliders.
