Sudakov resummation for prompt-photon production in hadron collisions
Sudakov resummation for prompt-photon production in hadron collisions
复制标题
强子碰撞中瞬发光子产生的苏达科夫恢复
DOI：
10.1088/1126-6708/1998/07/024
复制
发表时间：
1998
影响因子：
5.4
通讯作者：
P. Nason
中科院分区：
文献类型：
--
作者：
S. Catani;M. Mangano;P. Nason
本文给出了强子碰撞中产生的双光子横向能量分布中大-xT Sudakov效应的显式表达式，精确到接近领先的对数（NLL）。碎裂过程并不有助于在NLL水平的Sudakov再结晶。在梅林空间中，辐射因子是玻恩过程中出现的每个外部有色部分子的独立辐射体乘以一个描述初态和终态软胶子辐射之间干扰的简单因子的乘积。公式给出的梅林时刻，并可用于唯象应用程序使用标准技术的反梅林变换。在这项工作中提出的计算，当添加到现有的DY和DIS生产的工作，完成必要的理论基础工作进行全球配合的部分子密度与统一的NLL精度在大x区域。
We present the explicit expressions for the resummation of large-xT Sudakov effects in the transverse-energy distribution of prompt-photons produced in hadronic collisions, to next-to-leading logarithmic (NLL) accuracy. Fragmentation processes do not contribute to the Sudakov resummation at NLL level. In Mellin space, the resummed radiative factor is the product of independent radiators for each external coloured parton appearing in the Born process, times a simple factor describing the interferences between initial- and final-state soft-gluon radiation. The formulae are given in terms of Mellin moments, and can be used for phenomenological applications using standard techniques for the inverse-Mellin transforms. The calculations presented in this work, when added to the existing works on DY and DIS production, complete the theoretical ground-work necessary to carry out global fits of parton densities with a uniform NLL accuracy in the large-x region.